參數(shù)資料
型號： NT68P81H
廠商： Electronic Theatre Controls, Inc.
英文描述： USB Keyboard Micro-Controller
中文描述： USB鍵盤微控制器
文件頁數(shù)： 14/30頁
文件大?。?/td> 1003K
代理商： NT68P81H
NT68P81
14
5. System Reserved Registers
Address
Register
Reset
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R/W
$0000
IRQFUNC
00H
KBD
INT1
INT0
TMR
R
$0001
IRQCLRF
00H
CKBD
CINT1
CINT0
CTMR
W
$0002
IE_FUNC
00H
EKBD
EINT1
EINT0
ETMR
R/W
$0003
IRQUSB
00H
SUSP
STUP
IN2
IN1
OT0
IN0
R
$0004
IRQCLRU
00H
CSUSP
CSTUP
CIN2
CIN1
COT0
CIN0
W
$0005
IE_USB
00H
ESUSP
ESTUP
EIN2
EIN1
EOT0
EIN0
R/W
$0006
BT
00H
BT7
BT6
BT5
BT4
BT3
BT2
BT1
BT0
W
$0007
TCON
01H
ENBT
W
$0008
TMOD
00H
TM2
TM1
TM0
R/W
$0009
PORT0
FFH
P07
P06
P05
P04
P03
P02
P01
P00
R/W
$000A
PORT1
FFH
P17
P16
P15
P14
P13
P12
P11
P10
R/W
$000B
PORT2
FFH
P27
P26
P25
P24
P23
P22
P21
P20
R/W
$000C
PORT3
1FH
P34
P33
P32
P31
P30
R/W
$000D
LED
07H
LED2
LED1
LED0
W
$000E
CLRWDT
00H
0
1
0
1
0
1
0
1
W
$000F
MODE_FG
02H
POF
SUSF
R/W
: no effect
6. Power-on Reset
Built-in power-on reset circuit can generate a minimum of
5ms pulse to reset the entire chip. The user also can use
an external
RESET
pin to reset the entire chip.
7. Timing Generator
This block generates the system timing and control
signals supplied to the CPU and on-chip peripherals. The
crystal oscillator generates a 6MHz system clock. It only
generates 3MHz clock for CPU.
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