UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 194
UPD78F9222MC(T)-5A4-A
Manufacturer Part Number
UPD78F9222MC(T)-5A4-A
Description
8BIT MCU, 4K FLASH, 256B RAM, 78F9222
Manufacturer
NEC
Datasheet
1.UPD78F9222MCT-5A4-A.pdf
(414 pages)
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
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(7) Input switch control register (ISC)
(8) Port mode register 4 (PM4)
194
The input switch control register (ISC) is used to receive a status signal transmitted from the master during LIN
(Local Interconnect Network) reception.
By setting 1 to ISC0 and ISC1, the input source to INTP0 and TI000 switches to the input signal from the
P44/RxD6 pin.
This register can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears this register to 00H.
This register sets port 4 input/output in 1-bit units.
When using the P43/TxD6/INTP1 pin for serial interface data output, clear PM43 to 0 and set the output latch of
P43 to 1.
When using the P44/RxD6 pin for serial interface data input, set PM44 to 1. The output latch of P44 at this time
may be 0 or 1.
PM4 can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets this register to FFH.
Address: FF8CH
Address: FF24H
Symbol
PM4
Symbol
ISC
PM4n
7
1
0
1
ISC1
ISC0
7
0
0
1
0
1
After reset: 00H
After reset: FFH
Output mode (output buffer on)
Input mode (output buffer off)
Figure 11-11. Format of Input Switch Control Register (ISC)
TI000 (P30)
RxD6 (P44)
INTP0 (P30)
RxD6 (P44)
6
1
Figure 11-12. Format of Port Mode Register 4 (PM4)
6
0
CHAPTER 11 SERIAL INTERFACE UART6
PM45
R/W
5
R/W
P4n pin I/O mode selection (n = 0 to 5)
User’s Manual U16898EJ5V0UD
5
0
PM44
4
INTP0 input source selection
4
0
TI000 input source selection
PM43
3
3
0
PM42
2
PM41
2
0
1
PM40
ISC1
0
1
ISC0
0
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