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參數(shù)資料
| 型號(hào)： | M38507F8SP |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| 封裝： | 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42 |
| 文件頁(yè)數(shù)： | 24/103頁(yè) |
| 文件大?。?/td> | 1275K |
| 代理商： | M38507F8SP |
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Rev.3.01
2003.06.20
page 25 of 98
3850 Group (Spec.A)
Fig. 19 Structure of port registers (1) (spec. A)
Port P0, P1, P2 pull-up control register
b7
b0
P0 pull-up control bit
0: No pull-up
1: Pull-up
P1 pull-up control bit
0: No pull-up
1: Pull-up
P2 pull-up control bit
0: No pull-up
1: Pull-up
Not used (return “0” when read)
b7b0
Port P3 pull-up control register
P30 pull-up control bit
0: No pull-up
1: Pull-up
P31 pull-up control bit
0: No pull-up
1: Pull-up
P32 pull-up control bit
0: No pull-up
1: Pull-up
P33 pull-up control bit
0: No pull-up
1: Pull-up
P34 pull-up control bit
0: No pull-up
1: Pull-up
Fix these bits to “0”.
(PULL3: address 001316)
(PULL012: address 001216)
Note: Pull-up control is valid when the corresponding bit
of the port direction register is “0” (input).
When that bit is “1” (output), pull-up cannot be set
to the port of which pull-up is selected.
Note: Pull-up control is valid when the corresponding bit
of the port direction register is “0” (input).
When that bit is “1” (output), pull-up cannot be set
to the port of which pull-up is selected.
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