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PDF COP87LXXCJ Data sheet ( Hoja de datos )
| Número de pieza | COP87LXXCJ | |
| Descripción | 8-Bit CMOS OTP Microcontrollers with 4k or 32k Memory and Comparator | |
| Fabricantes | National Semiconductor | |
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PRELIMINARY
September 1999
COP87LxxCJ/RJ Family
8-Bit CMOS OTP Microcontrollers with 4k or 32k Memory
and Comparator
General Description
The COP87LxxCJ/RJ Family OTP (One Time Program-
mable) microcontrollers are integrated COP8™ Base core
devices with 4k or 32k memory, and an Analog comparator
(no brownout). These multi-chip CMOS devices are suited
for lower-functionality applications, and as pre-production
devices for a ROM design. Low cost, pin and software com-
patible (plus Brownout) 1k or 2k ROM versions are available
(COP820CJ/840CJ Family). Versions are available for use
with a range of COP8 software and hardware development
tools.
Family features include an 8-bit memory mapped architec-
ture, 10 MHz CKI with 1µs instruction cycle, three clock op-
tions (-1 = crystal; -2 = external; -3 = internal RC), one multi-
function 16-bit timer/counter, MICROWIRE/PLUS™ serial
I/O, one analog comparator, power saving HALT mode with
multi-sourced wakeup/interrupt capability, on-chip R/C oscil-
lator capacitor, high current outputs, software selectable I/O
options, WATCHDOG™ timer, modulator/timer, Power on
Reset, program code security, 2.7V to 5.5V operation and
20/28 pin packages.
In this datasheet, the term COP87L20CJ refers to the
COP87L20CJ, and COP87L22CJ. COP840CJ refers to the
COP87L40CJ, COP87L42CJ, COP87L40RJ, and
COP87L42RJ.
Devices included in this datasheet are:
Device
COP87L20CJ
COP87L22CJ
COP87L40CJ
COP87L42CJ
COP87L40RJ
COP87L42RJ
Memory (bytes)
4k OTP EPROM
4k OTP EPROM
4k OTP EPROM
4k OTP EPROM
32k OTP EPROM
32k OTP EPROM
RAM (bytes)
64
64
128
128
128
128
I/O Pins
24
16
24
16
24
16
Packages
28 DIP/SOIC
20 DIP/SOIC
28 DIP/SOIC
20 DIP/SOIC
28 DIP/SOIC
20 DIP/SOIC
Temperature
-40 to +85˚C
-40 to +85˚C
-40 to +85˚C
-40 to +85˚C
-40 to +85˚C
-40 to +85˚C
Key Features
n Multi-Input Wakeup (on the 8-bit Port L)
n Analog comparator
n Modulator/Timer (high speed PWM timer for IR
transmission)
n 16-bit multi-function timer supporting
— PWM mode
— External event counter mode
— Input capture mode
n Integrated capacitor for the R/C oscillator
n 4 or 32 kbyte on-board OTP EPROM with security
feature
n 64 or 128 bytes on-chip RAM
I/O Features
n Software selectable I/O options (TRI-STATE®, Push-Pull,
Weak Pull-Up Input, High Impedance Input)
n High current outputs (8 pins)
n Schmitt trigger inputs on Port G
n MICROWIRE/PLUS serial I/O
n Packages:
— 20 DIP/SO with 16 I/O pins
— 28 DIP/SO with 24 I/O pins
CPU/Instruction Set Features
n 1 µs instruction cycle time
n Three multi-source interrupts servicing
— External interrupt with selectable edge
— Timer interrupt
— Software interrupt
n Versatile and easy to use instruction set
n 8-bit stack pointer (SP) — stack in RAM
n Two 8-bit Register Indirect Data Memory Pointers (B and
X)
Fully Static CMOS
n Low current drain (typically <1 µA)
n Single supply operation: 2.7V to 5.5V
n Temperature range: −40˚C to +85˚C
Development Support
n Emulation device for the COP820CJ/COP840CJ
n Real time emulation and full program debug offered by
MetaLink Development Systems
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
COP8™, MICROWIRE™, MICROWIRE/PLUS™ and WATCHDOG™ are trademarks of National Semiconductor Corporation.
iceMASTER® is a registered trademark of MetaLink Corporation.
© 1999 National Semiconductor Corporation DS012529
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1 page  
DC Electrical Characteristics (Continued)
Note 4: The HALT mode will stop CKI from oscillating in the RC and crystal configurations by bringing CKI high. HALT test conditions: L, and G0..G5 ports configured
as outputs and set high. The D port set to zero. All inputs tied to VCC. The comparator is disabled.
Note 5: The user must guarantee that D2 pin does not source more than 10 mA during RESET. If D2 sources more than 10 mA during reset, the device will go into
programming mode.
Note 6: Pins G6 and RESET are designed with a high voltage input network. These pins allow input voltages greater than VCC and the pins will have sink current
to VCC when biased at voltages greater than VCC (the pins do not have source current when biased at a voltage below VCC). The effective resistance to VCC is 750Ω
(typical). These two pins will not latch up. The voltage at the pins must be limited to less than 14V.
AC Electrical Characteristics
−40˚C ≤ TA ≤ +85˚C unless otherwise specified
Parameter
Conditions
Instruction Cycle Time (tc)
Crystal/Resonator
R/C Oscillator
CKI Clock Duty Cycle (Note 7)
4.5V ≤ VCC ≤ 5.5V
4.5V ≤ VCC ≤ 5.5V
fr = Max
Rise Time (Note 7)
fr = 10 MHz ext. Clock
Fall Time (Note 7)
fr = 10 MHz ext. Clock
Inputs
tSetup
tHold
Output Propagation Delay
tPD1, tPD0
SO, SK
All Others
Input Pulse Width
4.5V ≤ VCC ≤ 5.5V
4.5V ≤ VCC ≤ 5.5V
RL = 2.2k, CL = 100 pF
4.5V ≤ VCC ≤ 5.5V
4.5V ≤ VCC ≤ 5.5V
Interrupt Input High Time
Interrupt Input Low Time
Timer Input High Time
Timer Input Low Time
MICROWIRE™ Setup Time (tµWS)
MICROWIRE Hold Time (tµWH)
MICROWIRE Output
Propagation Delay (tµPD)
Reset Pulse Width
Note 7: Parameter characterized but not production tested.
Min Typ Max Units
1 DC µs
2 DC µs
40 60 %
12 ns
8 ns
200 ns
60 ns
0.7 µs
1 µs
1 tc
1 tc
1 tc
1 tc
20 ns
56 ns
220 ns
1 µs
DS012529-4
FIGURE 3. MICROWIRE/PLUS Timing
5
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5 Page 
Timer/Counter
The device has a powerful 16-bit timer with an associated
16-bit register enabling it to perform extensive timer func-
tions. The timer T1 and its register R1 are each organized as
two 8-bit read/write registers. Control bits in the register
CNTRL allow the timer to be started and stopped under soft-
ware control. The timer-register pair can be operated in one
of three possible modes. Table 5 details various timer oper-
ating modes and their requisite control settings.
TABLE 5. Timer Operating Modes
CNTRL
Bits
765
000
001
010
011
100
101
110
111
Operation Mode
External Counter w/Auto-Load Reg.
External Counter w/Auto-Load Reg.
Not Allowed
Not Allowed
Timer w/Auto-Load Reg.
Timer w/Auto-Load Reg./Toggle TIO Out
Timer w/Capture Register
Timer w/Capture Register
T Interrupt
Timer Underflow
Timer Underflow
Not Allowed
Not Allowed
Timer Underflow
Timer Underflow
TIO Pos. Edge
TIO Neg. Edge
Timer
Counter
On
TIO Pos. Edge
TIO Neg. Edge
Not Allowed
Not Allowed
tc
tc
tc
tc
MODE 1. TIMER WITH AUTO-LOAD REGISTER
In this mode of operation, the timer T1 counts down at the in-
struction cycle rate. Upon underflow the value in the register
R1 gets automatically reloaded into the timer which contin-
ues to count down. The timer underflow can be programmed
to interrupt the microcontroller. A bit in the control register
CNTRL enables the TIO (G3) pin to toggle upon timer under-
flows. This allows the generation of square-wave outputs or
pulse width modulated outputs under software control (Fig-
ure 8).
MODE 2. EXTERNAL COUNTER
In this mode, the timer T1 becomes a 16-bit external event
counter. The counter counts down upon an edge on the TIO
pin. Control bits in the register CNTRL program the counter
to decrement either on a positive edge or on a negative
edge. Upon underflow the contents of the register R1 are au-
tomatically copied into the counter. The underflow can also
be programmed to generate an interrupt (Figure 8).
as a positive edge or as a negative edge. In this mode the
user can elect to be interrupted on the specified trigger edge
(Figure 9).
DS012529-11
FIGURE 9. Timer Capture Mode Block Diagram
TIMER PWM APPLICATION
Figure 10 shows how a minimal component D/A converter
can be built out of the Timer-Register pair in the Auto-Reload
mode. The timer is placed in the “Timer with auto reload”
mode and the TIO pin is selected as the timer output. At the
outset the TIO pin is set high, the timer T1 holds the on time
and the register R1 holds the signal off time. Setting TRUN
bit starts the timer which counts down at the instruction cycle
rate. The underflow toggles the TIO output and copies the off
time into the timer, which continues to run. By alternately
loading in the on time and the off time at each successive in-
terrupt a PWM frequency can be easily generated.
DS012529-9
FIGURE 8. Timer/Counter Auto
Reload Mode Block Diagram
MODE 3. TIMER WITH CAPTURE REGISTER
Timer T1 can be used to precisely measure external fre-
quencies or events in this mode of operation. The timer T1
counts down at the instruction cycle rate. Upon the occur-
rence of a specified edge on the TIO pin the contents of the
timer T1 are copied into the register R1. Bits in the control
register CNTRL allow the trigger edge to be specified either
11
DS012529-12
FIGURE 10. Timer Application
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| PDF Descargar | [ Datasheet COP87LXXCJ.PDF ] | |
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