參數(shù)資料
型號(hào): UPD68AMC-XXX-5A4
元件分類: 微控制器/微處理器
英文描述: 4-BIT, OTPROM, 4.5 MHz, MICROCONTROLLER, PDSO20
封裝: 0.300 INCH, PLASTIC, SSOP-20
文件頁數(shù): 8/73頁
文件大?。?/td> 561K
代理商: UPD68AMC-XXX-5A4
14
PD67, 67A, 68, 68A, 69
Data Sheet U14935EJ2V1DS
3. PORT REGISTERS (PX)
The KI/O port, the KI port, the special ports (S0, S1/LED, S2), and the control registers are treated as port registers.
After reset, the port register values are as shown below.
Figure 3-1. Port Register Configuration
Notes 1.
×: Refers to the value based on the KI and S2 pin state.
2.
×: Refers to the value based on decrease of power supply voltage (0 when VDD ≤ VID)
Remark VID: RAM retention detection voltage
Table 3-1. Relationship Between Ports and Reading/Writing
Port Name
Input Mode
Output Mode
Read
Write
Read
Write
KI/O
Pin state
Output latch
KI
Pin state
S0
Pin state
Note
S1/LED
Pin state
Pin state
S2
Pin state
Note When in OFF mode, “1” is always read.
Port register
P0
KI/O7
P00
After reset
FFH
KI/O6
KI/O5
KI/O4
KI/O3
KI/O2
KI/O1
KI/O0
P10
P1
KI3
P01
××××11×1BNote 1
KI2
KI1
KI0
S1/LED
S0
S2
1
P11
P3 (control register 0)
DP11
P03
0000
×000BNote 2
DP10
DP9
DP8
RAM
retention
flag
–ID1
ID0
P13
P4 (control register 1)
0
P04
26H
0
KI
Pull-down
S0/S1
Pull-down
S2
STOP release
S1/LED mode
KI/O mode
S0 mode
P14
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