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參數(shù)資料
| 型號： | NT6868C |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Keyboard Controller |
| 中文描述： | 鍵盤控制器 |
| 文件頁數(shù)： | 4/15頁 |
| 文件大?。?/td> | 211K |
| 代理商： | NT6868C |
NT6868C
4
System Reserved Registers
Address
Register
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
R/W
$00C0
BT
BT7
BT6
BT5
BT4
BT3
BT2
BT1
BT0
W
$00C1
TCON
-
-
-
-
-
-
-
ENBT
W
$00C2
CLRIRQX
-
-
-
-
-
-
-
CLRIRQTMR
W
$00C3
PORT0
PD07
PD06
PD05
PD04
PD03
PD02
PD01
PD00
RW
$00C4
PORT1
PD17
PD16
PD15
PD14
PD13
PD12
PD11
PD10
RW
$00C5
PORT2
PD27
PD26
PD25
PD24
PD23
PD22
PD21
PD20
RW
$00C6
PORT3
-
-
-
PD34
PD33
PD32
PD31
PD30
RW
$00C7
CLK
-
-
-
-
-
-
-
CLK
RW
$00C8
DATA
-
-
-
-
-
-
-
DATA
RW
$00C9
LED
-
-
-
-
-
LED2
LED1
LED0
W
$00CA
CLRWDT
0
1
0
1
0
1
0
1
W
$00CB
X
X
X
X
X
X
X
X
X
X
$00CC
X
X
X
X
X
X
X
X
X
X
$00CD
X
X
X
X
X
X
X
X
X
X
$00CE
X
X
X
X
X
X
X
X
X
X
$00CF
X
X
X
X
X
X
X
X
X
X
- : no effect
X : access not allowed
4K X 8 ROM
The built-in ROM program code, executed by the 6502
CPU, has a capacity of 4K X 8 bits and is addressed
from
F000H
to
FFFFH
.
128 X 8 SRAM
The built-in SRAM is used for general purpose data
memory and for the stack area. SRAM is addressed from
0000H to
007FH
. The user can allocate stack area in the
SRAM by setting the stack pointer register (S). Since
6502C’ s default stack pointer is 01FFH, it must be
mapped to
007FH
. Mapping from 01XX to 00XX is done
internally by setting the S register to
7FH
via software
programming.
For example :
LDX #$7F
TXS
Power-On Reset
The built-in power-on reset circuit can generate a 150ms
pulse to reset the entire chip. The beginning of the
150ms pulse occurs at 60% of V
DD
when powered on.
The start of 150ms pulse
V
DD
t
power
60%
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NT6868CH | Insulation Displacement (IDC) Connector; No. of Contacts:20; Contact Termination:IDC; Gender:Male; Contact Plating:Gold RoHS Compliant: Yes |
| NT6881 | USB Keyboard Micro-Controller |
| NT68F62 | 8-Bit Microcontroller for Monitor (32K Flash MTP Type) |
| NT68F62U | 8-Bit Microcontroller for Monitor (32K Flash MTP Type) |
| NT68P61A | 8-Bit Microcontroller for Monitor (24K OTP ROM Type) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NT6868CH | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Keyboard Controller |
| NT6880 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Keyboard Controller |
| NT6880H | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Keyboard Controller |
| NT6881 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:USB Keyboard Micro-Controller |
| NT68F62 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller for Monitor (32K Flash MTP Type) |
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