参数资料
型号: UPD78F9202MA-CAC-A
厂商: Renesas Electronics America
文件页数: 125/158页
文件大小: 0K
描述: MCU 8BIT 4KB FLASH 128B RAM
标准包装: 400
系列: 78K0S/Kx1+
核心处理器: 78K0S
芯体尺寸: 8-位
速度: 10MHz
外围设备: LVD,POR,PWM,WDT
输入/输出数: 7
程序存储器容量: 4KB(4K x 8)
程序存储器类型: 闪存
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 2 V ~ 5.5 V
数据转换器: A/D 4x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 10-LSSOP(0.225",5.72mm 宽)
包装: 托盘
CHAPTER 4 PORT FUNCTIONS
User’s Manual U18172EJ3V0UD
67
(1) Port mode registers (PM2 to PM4)
These registers are used to set the corresponding port to the input or output mode in 1-bit units.
Each port mode register can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets these registers to FFH.
When a port pin is used as an alternate-function pin, set its port mode register and output latch as shown in
Table 4-4.
Caution
Because P21 and P32 are also used as external interrupt pins, the corresponding interrupt
request flag is set if each of these pins is set to the output mode and its output level is
changed. To use the port pin in the output mode, therefore, set the corresponding interrupt
mask flag to 1 in advance.
Figure 4-12. Format of Port Mode Register
Address: FF22H, After reset: FFH, R/W
Symbol
7
6
5
4
3
2
1
0
PM2
1
PM23
PM22
PM21
PM20
Address: FF23H, After reset: FFH, R/W
Symbol
7
6
5
4
3
2
1
0
PM3
1
PM32
1
Address: FF24H, After reset: FFH, R/W
Symbol
7
6
5
4
3
2
1
0
PM4
1
Note
1
Note
1
Note
1
Note
PM43
1
Note
1
Note
PM40
PMmn
Selection of I/O mode of Pmn pin (m = 2 to 4; n = 0 to 3)
0
Output mode (output buffer ON)
1
Input mode (output buffer OFF)
Note
In
μPD78F920x, set PM41, PM42, and PM44 to PM47 to "0" at program initialization.
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