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NT6880 の電気的特性と機能

NT6880のメーカーはETCです、この部品の機能は「Keyboard Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 NT6880
部品説明 Keyboard Controller
メーカ ETC
ロゴ ETC ロゴ 




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NT6880 Datasheet, NT6880 PDF,ピン配置, 機能
NT6880
Features
T Built-in 6502 8-bit CPU
T 2 MHz CPU operation frequency
T 5K bytes of ROM
T 160 bytes of SRAM
T One 8-bit programmable base timer with
1 - 256 µsec interval
T 29 programmable bi-directional I/O pins
T 3 LED direct sink pins
Keyboard Controller
T Mask optional for built-in RC oscillator with an
external resistor or external ceramic resonator applied
T Mask optional for DATA/CLK driving capability
T Watch-dog timer reset
T Built-in power-on reset
T Built-in low voltage reset
T CMOS technology for low power consumption
T Available in 40 pin DIP package and 40 pad Chip
Form
General Description
The NT6880 is a single chip micro-controller for
keyboard applications. It incorporates a 6502 8-bit CPU
core, 5K bytes of ROM and 160 bytes of RAM used as
working RAM and stack area. It also includes 29
programmable bi-directional I/O pins and one 8-bit pre-
loadable base timer. Additionally, it includes a built-in
low voltage reset, a 4MHz RC oscillator requiring an
externally applied resistor or a 4MHz ceramic resonator
and a watch-dog timer that prevents system standstill.
Pin Configuration
GND
NC
DATA
CLK
P30
P31
P32
P33
P34
RESET
P00
P01
P02
P03
P04
P05
P06
P07
P10
P11
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40 OSCI
39 R/OSCO
38 VDD
37 LED2
36 LED1
35 LED0
34 P27
33 P26
32 P25
31 P24
30 P23
29 P22
28 P21
27 P20
26 P17
25 P16
24 P15
23 P14
22 P13
21 P12
Pad Configuration
PPPPPPPPPP
1111111100
7654321076
26 25 24 23 22 21 20 19 18 17
16 P05
15 P04
P20 27
14 P03
P21 28
13 P02
P22 29
12 P01
P23 30
P24 31
NT6880H
11 P00
10 RESET
P25 32
9 P34
P26 33
8 P33
P27 34
7 P32
LED0
LED1
35
36
37 38 39 40 1
2345
6 P31
LVR OG
E D / SN
D DO CD
2 SI
C
O
NDCP
CAL 3
TK0
A
1 V1.0

1 Page





NT6880 pdf, ピン配列
Functional Description
1. 6502 CPU
The 6502 is an 8-bit CPU. Please refer to the 6502 data sheet for more details.
NT6880
70
ACCUMULATOR A
70
INDEX REGISTER X
70
INDEX REGISTER Y
0000
009F
00C0
00CF
SRAM
UNUSED
SYSTEM REGISTERS
STACK PTR
15
PROGRAM COUNTER PC
0
UNUSED
70
EC00
S STACK POINTER SP
7
SV
0
B D I Z C STATUS REGISTER P
CARRY
ZERO
INTERRUPT MASK
DECIMAL MODE
BREAK
OVERFOLW
SIGN
FFFA
FFFB
FFFC
FFFD
FFFE
FFFF
USER ROM
NMI-L
NMI-H
RST-L
RST-H
IRQ-L
IRQ-H
NMI VECTOR
IRQ VECTOR
Figure 1.1 6502 CPU Registers and Status Flags
Figure 1.2. NT6880 Memory Map
3


3Pages


NT6880 電子部品, 半導体
NT6880
9. I/O PORTs
The NT6880 has 31 pins dedicated to input and output. These pins are grouped into 6 ports, as follows:
9.1. PORT0: (P00 - P07)
PORT0 is an 8-bit bi-directional CMOS I/O port that is internally pulled High by PMOS. Each pin of PORT0 can be bit
programmed as an input or output pin under the software control. When programmed as output, data is latched to the port
data register and output to the pin. PORT0 pins with ''1'' written to them are pulled high by the internal PMOS pull-ups, and
are used as inputs in that state. These input signals can then be read. The port output is High after reset.
9.2. PORT1: ( P10 - P17 ): Functions are the same as PORT0.
9.3. PORT2: ( P20 - P27) : Functions are the same as PORT0.
9.4. PORT3: ( P30 - P34) : Functions are the same as PORT0.
CLK & DATA
: These two pins have the same structure as I/O ports.
PORT Registers:
Addr.
$00C3
$00C4
$00C5
$00C6
$00C7
$00C8
Register
PORT0
PORT1
PORT2
PORT3
CLK
DATA
Bit7
PD07
PD17
PD27
-
-
-
Bit6
PD06
PD16
PD26
-
-
-
Bit5
PD05
PD15
PD25
-
-
-
Bit4
PD04
PD14
PD24
PD34
-
-
Bit3
PD03
PD13
PD23
PD33
-
-
Bit2
PD02
PD12
PD22
PD32
-
-
Bit1
PD01
PD11
PD21
PD31
-
-
Bit0
PD00
PD10
PD20
PD30
CLK
DATA
R/W
(RW)
(RW)
(RW)
(RW)
(RW)
(RW)
WREN
DB
RST
Latch
L
Q
D SD
V DD
Weak PMOS
IO
RDENB
Figure 9.1. I/O Port Structure
6

6 Page



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共有リンク

Link :


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NT6880

Keyboard Controller

ETC
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NT6880H

Keyboard Controller

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NT6881

USB Keyboard Micro-Controller

ETC
ETC


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