參數(shù)資料
型號(hào): M34551E8-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, OTPROM, MICROCONTROLLER, PQFP48
封裝: 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48
文件頁數(shù): 135/154頁
文件大?。?/td> 1778K
代理商: M34551E8-XXXFP
2-4
APPLICATION
2.1 I/O pins
4551 Group User’s Manual
2.1.2 Related registers
(1)
Pull-up control register PU0
Register PU0 controls the ON/OFF of the port P10–P13 pull-up transistor and the ON/OFF of the key-
on wakeup function.
Set the contents of this register through register A with the TPU0A instruction.
The contents of register PU0 is transferred to register A with the TAPU0 instruction.
Table 2.1.1 shows the pull-up control register PU0.
Table 2.1.1 Pull-up control register PU0
Pull-up control register PU0
at reset : 00002
at power down : state retained
R/W
Pull-up transistor OFF, no key-on wakeup function
Pull-up transistor ON, key-on wakeup function
Pull-up transistor OFF, no key-on wakeup function
Pull-up transistor ON, key-on wakeup function
Pull-up transistor OFF, no key-on wakeup function
Pull-up transistor ON, key-on wakeup function
Pull-up transistor OFF, no key-on wakeup function
Pull-up transistor ON, key-on wakeup function
Port P13
pull-up transistor control bit
Port P12
pull-up transistor control bit
Port P11
pull-up transistor control bit
Port P10
pull-up transistor control bit
0
1
0
1
0
1
0
1
PU03
PU02
PU01
PU00
Note: “R” represents read enabled, “W” represents write enabled.
(2)
LCD control register L2
Register L2 is used to select the port P2 function or segment output pin function.
Set the contents of this register through register A with the TL2A instruction.
Table 2.1.2 shows the LCD control register L2.
Table 2.1.2 LCD control register L2
LCD control register L2
at reset : 11112
at power down : state retained
W
SEG19
P23
SEG18
P22
SEG17
P21
SEG16
P20
P23/SEG19 function switch bit
P22/SEG18 function switch bit
P21/SEG17 function switch bit
P20/SEG16 function switch bit
0
1
0
1
0
1
0
1
Note: “W” represents write enabled.
L23
L22
L21
L20
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