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參數(shù)資料
| 型號(hào)： | mPD789326GB-xxx-8ET |
| 廠商： | NEC Corp. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
| 中文描述： | 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存 |
| 文件頁數(shù)： | 25/96頁 |
| 文件大?。?/td> | 482K |
| 代理商： | MPD789326GB-XXX-8ET |
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Preliminary Product Information U14673EJ1V0PM00
25
μ
PD789322,789324,789326,789327
(3) Pull-up resistor option register B2 (PUB2)
This register sets whether to use on-chip pull-up resistors for P20 to P22 in bit units. An on-chip pull-up
resistor can be used only for those bits set to the input mode of a port for which the use of the on-chip pull-up
resistor has been specified using PUB2.
For those bits set to the output mode, on-chip pull-up resistors cannot be used, regardless of the setting of
PUB2. This also applies to alternate-function pins used as output pins.
PUB2 is set using a 1-bit or 8-bit memory manipulation instruction.
RESET input sets this register to 00H.
Figure 5-5. Format of Pull-Up Resistor Option Register B2
Symbol
7
6
5
4
3
<2>
<1>
<0>
Address
After reset
R/W
PUB2
0
0
0
0
0
PUB22
PUB21
PUB20
FF32H
00H
R/W
PUB2n
P2n on-chip pull-up resistor selection
(n = 0 to 2)
0
An on-chip pull-up resistor is not connected
1
An on-chip pull-up resistor is connected
Caution Always set bits 3 to 7 to 0.
(4) Port function register 8 (PF8)
This register sets the port function of port 8 in 1-bit units.
The pins of port 8 are selected as either LCD segment signal outputs or general-purpose port pins according
to the setting of PF8.
PF8 can be set using a 1-bit or 8-bit memory manipulation instruction.
RESET input sets this register to 00H.
Figure 5-6. Format of Port Function Register 8
Symbol
7
6
5
4
3
2
1
0
Address
After reset
R/W
PF8
0
0
PF85
PF84
PF83
PF82
PF81
PF80
FF58H
00H
R/W
PF8n
P8n port function (n = 0 to 5)
0
Operates as a general-purpose port
1
Operates as an LCD segment signal output
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