UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 63

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

Address: FF22H After reset: FFH R/W
Symbol
PM2
Address: FF23H After reset: FFH R/W
Symbol
PM3
Address: FF24H After reset: FFH R/W
Symbol
PM4
Address: FF2CH After reset: FFH R/W
Symbol
PM12
(2) Port registers (P2, P3, P4, P12, P13)
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, P30, P31, P34, P40 to P45, P121 to P123, and P130 are set by using a 1-bit or 8-bit memory
manipulation instruction.
Reset signal generation sets these registers to 00H.
PMmn
7
1
7
1
7
1
7
1
0
1
Output mode (output buffer ON)
Input mode (output buffer OFF)
6
1
6
1
6
1
6
1
Figure 4-13. Format of Port Mode Register
PM45
Selection of I/O mode of Pmn pin (m = 2, 3, 4, or 12; n = 0 to 5)
5
1
5
1
5
5
1
CHAPTER 4 PORT FUNCTIONS
User’s Manual U16898EJ5V0UD
PM44
4
1
4
1
4
4
1
PM123
PM23
PM43
3
3
1
3
3
PM122
PM22
PM42
2
2
1
2
2
PM121
PM21
PM31
PM41
1
1
1
1
PM20
PM30
PM40
0
0
0
0
1
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