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PDF SM894051 Data sheet ( Hoja de datos )
| Número de pieza | SM894051 | |
| Descripción | 8-Bits Micro-controller | |
| Fabricantes | SyncMOS | |
| Logotipo |  |
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SyncMOS Technologies Inc.
Product List
SM894051L25, 25 MHz 4KB internal memory MCU
SM894051C25, 25 MHz 4KB internal memory MCU
SM894051C40, 40 MHz 4KB internal memory MCU
General Description
The SM894051 series product is an 8-bits single
chip micro controller with 4KB flash embedded. It
provides hardware features and a powerful
instruction set, necessary to make it a versatile and
cost effective controller for those applications
demand up to 15 I/O pins or need up to 4KB flash
memory either for program or for data or mixed.
To program the flash block, a commercial
programmer is capable to do it.
Ordering Information
SM894051ihhkL
yymmv
i: process identifier {L=3.0V~3.6V,C=4.5V~ 5.5V}
hh: working clock in MHz {25, 40}
k: package type postfix {as below table}
yy: year, mm: month
v: version identifier {, A, B,...}
L: PB free identifier {no text is Non-PB free, “P” is PB free}
Feature
SM894051
8-Bits Micro-controller
With 4KB Flash ROM embedded
l Working voltage: 3.0V ~ 3.6V For L Version
4.5V ~ 5.5V For C Version
l General 8051 family compatible
l 12 clocks per machine cycle
l 4 KB internal flash memory
l 128 bytes internal RAM
l Two 16 bits timers/counters
l 15 programmable I/O lines
l Full duplex serial UART channel
l Bit operation instruction
l Industrial Level
l 8-bits unsigned division
l 8-bits unsigned multiply
l BCD arithmetic
l Direct addressing
l Indirect addressing
l Two priority level interrupt
l Power save modes:
Idle mode
Power down mode (provide H/W wake-up
function)
l Code protection function
l One watch dog timer (WDT)
l Low EMI (inhibit ALE)
l On-chip Analog Comparator
l Direct LED Drive Output (Default = 1)
Taiwan
4F, No. 1 Creation Road 1,
Science-based Industrial Park,
Hsinchu, Taiwan 30077
TEL: 886-3-578-3344 #2667
886-3-579-2987
FAX: 886-3-5792960
886-3-5780493
Specifications subject to change without notice contact your sales representatives for the most recent information.
SM894051 V1.0 March 2006
1
1 page  
Addr
93H
95H
97H
9FH
BFH
SyncMOS Technologies Inc.
SFR
LEDENP1
LEDENP3
WDTKEY
WDTC
SCONF
Reset
00H
00H
00H
0*0**000
0******0
7
LEDEN
P17
LEDEN
P37
WDT
KEY7
WDTE
WDR
6
LEDEN
P16
Unused
WDT
KEY6
Reserve
Unused
5
LEDEN
P15
LEDEN
P35
WDT
KEY5
CLEAR
Unused
4
LEDEN
P14
LEDEN
P34
WDT
KEY4
Unused
Unused
SM894051
8-Bits Micro-controller
With 4KB Flash ROM embedded
3
LEDEN
P13
LEDEN
P33
WDT
KEY3
Unused
2
LEDEN
P12
LEDEN
P32
WDT
KEY2
PS2
1
LEDEN
P11
LEDEN
P31
WDT
KEY1
PS1
0
LEDEN
P10
LEDEN
P30
WDT
KEY0
PS0
Unused Reserve Unused ALEI
Operating Conditions
Symbol
TA
TS
VCC5
VCC3.3
Fosc 25
Fosc 40
Description
Operating temperature
Storage temperature
Supply voltage
Supply voltage
Oscillator Frequency
Oscillator Frequency
Min. Typ. Max. Unit.
-40 25 85 ℃
-55 25 155 ℃
4.5 5.0 5.5 V
3.0 3.3 3.6 V
25 MHz
40 MHz
Remarks
Ambient temperature under bias
Damage to devices could occur
For 3.3V application
For 5.0V application
DC Characteristic
VCC = 5V (±10%), VSS=0V TA= -40℃ to 85℃
SYMBOL
PARAMETER
VCC
ICC
Supply Voltage
Supply current operating
IID Supply current IDLE Mode
IPD Supply current Power-Down MODE
VIL1
VIL2
VIH1
VIH2
IIL
ITL
ILI
Input LOW voltage, P1, P3
Input LOW voltage, RES, XTAL1
Input HIGH voltage, P1, P3
Input HIGH voltage, RES, XTAL1
Input current LOW level, P3.0~P3.5, P3.7
Transition current High to Low, P3.0~P3.5,
P3.7
Input leakage current, P1.0~P1.1
VOL1
VOL2
VOH1
VOH2
RRST
CIO
Output LOW voltage, P1.2~P1.7, P3.0~P3.5,
P3.7
Output LOW voltage, P1.0~P1.1
Output High voltage, P3.0~P3.5, P3.7
Output High voltage, P1.2~P1.7
Output High voltage, P1.0~P1.1
(For comparator pin)
Internal RESET pull-down resistor
Pin capacitance
TEST
CONDITIONS
See notes 1
fCLK = 12MHz VCC = 5.5V
See note 2
fCLK = 12MHz VCC = 5.5V
See note 3；VCC (= 5.5V)
INPUT
VIN = 0.45V
VIN = 2.0 V
0.45V < VIN < VCC-0.3V
OUTPUT
IOL = 8mA，VCC=5.0V
IOL = 6.5mA，VCC =5.0V
IOH = -800uA，VCC =5.0V
IOH = -800uA，VCC =5.0V
IOH = -60µA，VCC =5.0V
VIN = 5.0 V
Test freq=1MHz, TA=25℃
LIMITS
MIN MAX
4.5 5.5
20
6.5
30
-0.5
0
2.0
70%VCC
0.8
0.8
Vcc+0.5
Vcc+0.5
-50
-650
±10
0.45
0.45
2.4
2.4
2.4
50 300
10
UNIT
V
mA
mA
µA
V
V
V
V
µA
µA
µA
V
V
V
V
V
kΩ
pF
Specifications subject to change without notice contact your sales representatives for the most recent information.
SM894051 V1.0 March 2006
5
5 Page 
SyncMOS Technologies Inc.
SM894051
8-Bits Micro-controller
With 4KB Flash ROM embedded
Extension Function Description
Watch Dog Timer
The Watch Dog Timer (WDT) is a 16-bits free-running counter that generate reset signal if the counter overflows.
The WDT is useful for systems that are susceptible to noise, power glitches, or electronics discharge which causing
software dead loop or runaway. The WDT function can help user software recover from abnormal software condition.
The WDT is different from Timer0, Timer1 of general 8051. To prevent a WDT reset can be done by software
periodically clearing the WDT counter. User should check WDR bit of SCONF register whenever unpracticed reset
happened.
The purpose of the secure procedure is to prevent the WDTC value from being changed when system runaway.
There is a 250KHz RC oscillator embedded in chip. Set WDTE = “1” will enable the RC oscillator and the frequency
is independent to the system frequency.
To enable the WDT is done by setting 1 to the bit 7 (WDTE) of WDTC. After WDTE set to 1, the 16-bits counter
starts to count with the RC oscillator. It will generate a reset signal when overflows. The WDTE bit will be cleared to
0 automatically when SM894051 been reset, either hardware reset or WDT reset.
To reset the WDT is done by setting 1 to the CLEAR bit of WDTC before the counter overflow. This will clear the
content of the 16-bits counter and let the counter re-start to count from the beginning.
Watch Dog Timer Registers
Watch Dog Key Register
WDTKEY ($97)
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
WDT KEY7 WDT KEY6 WDT KEY5 WDT KEY4 WDT KEY3 WDT KEY2 WDT KEY1 WDT KEY0
By default, the WDTC is read only. User needs to write values 1EH, 0E1H sequentially to the WDTKEY (97H)
register to enable the WDTC write attribute, which is
MOV WDTKEY, # 01EH
MOV WDTKEY, # 0E1H
When WDTC is set, user need to write another values E1H, 1EH sequentially to the WDTKEY (97H) register to
disable the WDTC write attribute, That is
MOV WDTKEY, # 0E1H
MOV WDTKEY, # 01EH
Watch Dog Timer Registers - WDT Control Register
WDTC ($9F)
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
WDTE
Reserve
CLEAR
Unused
Unused
PS2
PS1
PS0
WDTE: Watch Dog Timer enable bit
CLEAR: Watch Dog Timer reset bit
If CLEAR bit set to1, Watch Dog Timer will be reset. User don’t reset value to 0 .
PS [2:0] : Overflow period select bits
Specifications subject to change without notice contact your sales representatives for the most recent information.
SM894051 V1.0 March 2006
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet SM894051.PDF ] | |
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