参数资料
型号: UPD78F9201MA-CAC-A
厂商: Renesas Electronics America
文件页数: 127/158页
文件大小: 0K
描述: MCU 8BIT 2KB 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: 2KB(2K 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
68
(2) Port registers (P2 to P4)
These registers are used to write data to be output from the corresponding port pin to an external device
connected to the chip.
When a port register is read, the pin level is read in the input mode, and the value of the output latch of the
port is read in the output mode.
P20 to P23, P32, P40 and P43 are set by using a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets these registers to 00H.
Figure 4-13. Format of Port Register
Address: FF02H, After reset: 00H (Output latch) R/W
Symbol
7
6
5
4
3
2
1
0
P2
0
P23
P22
P21
P20
Address: FF03H, After reset: 00H
Note (Output latch) R/WNote
Symbol
7
6
5
4
3
2
1
0
P3
0
P34
0
P32
0
Address: FF04H, After reset: 00H (Output latch) R/W
Symbol
7
6
5
4
3
2
1
0
P4
0
P43
0
P40
m = 2 to 4; n = 0 to 4
Pmn
Controls of output data (in output mode)
Input data read (in input mode)
0
Output 0
Input low level
1
Output 1
Input high level
Note Because P34 is read-only, its reset value is undefined.
(3) Port mode control register 2 (PMC2) (
μPD78F920x only)
This register specifies the port/alternate function (except the A/D converter function) mode or the A/D
converter mode.
Each bit of the PMC2 register corresponds to each pin of port 2 and can be specified in 1-bit units.
PMC2 is set by using a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets PMC2 to 00H.
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