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)： 23/96頁
文件大小： 482K
代理商： MPD789326GB-XXX-8ET
Preliminary Product Information U14673EJ1V0PM00
23
μ
PD789322,789324,789326,789327
5.1.3 Port function control registers
The ports are controlled by the following three types of registers.
Port mode registers (PM0 to PM2, PM4, PM6, PM8)
Pull-up resistor option registers (PU0, PUB2)
Port function register 8 (PF8)
(1) Port mode registers (PM0 to PM2, PM4, PM6, PM8)
Input and output can be specified in 1-bit units.
These registers can be set using a 1-bit or 8-bit memory manipulation instruction.
RESET input sets these registers to FFH.
When using the port pins as their alternate functions, set the port mode register and the output latch as shown
in Table 5-3.
Caution Because P61 functions alternately as an external interrupt input, when the output level
changes after the output mode of the port function is specified, the interrupt request flag will
be inadvertently set. Therefore, be sure to preset the interrupt mask flag (PMK0) before
using the port in output mode.
Figure 5-3. Port Mode Register Format
Symbol
7
6
5
4
3
2
1
0
Address
After reset
R/W
PM0
1
1
1
1
PM03
PM02
PM01
PM00
FF20H
FFH
R/W
PM1
1
1
1
1
1
1
PM11
PM10
FF21H
FFH
R/W
PM2
1
1
1
1
1
PM22
PM21
PM20
FF22H
FFH
R/W
PM4
1
1
1
1
PM43
PM42
PM41
PM40
FF24H
FFH
R/W
PM6
1
1
1
1
1
1
PM61
PM60
FF26H
FFH
R/W
PM8
1
1
PM85
PM84
PM83
PM82
PM81
PM80
FF28H
FFH
R/W
PMmn
Pmn pin input/output mode selection
(m = 0 to 2, 4, 6, 8 n = 0 to 5)
0
Output mode (output buffer on)
1
Input mode (output buffer off)
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