NEC 78K0 User Manual page 275

(7) Input switch control register (ISC)
The input switch control register (ISC) is used to receive a status signal transmitted from the master during LIN
(Local Interconnect Network) reception. The input signal is switched by setting ISC.
This register can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears this register to 00H.
Address: FF4FH After reset: 00H
Symbol 7
ISC 0
ISC1
0
1
ISC0
0
1
(8) Port mode register 1 (PM1)
This register sets port 1 input/output in 1-bit units.
When using the P13/TxD3 pin for serial interface data output, clear PM13 to 0 and set the output latch of P13 to
1.
When using the P14/RxD6 pin for serial interface data input, set PM14 to 1. The output latch of P14 at this time
may be 0 or 1.
PM1 can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input sets this register to FFH.
Address: FF21H After reset: FFH
Symbol 7
PM1 PM17
PM1n
0 Output mode (output buffer on)
1 Input mode (output buffer off)
CHAPTER 13 SERIAL INTERFACE UART6
Figure 13-11. Format of Input Switch Control Register (ISC)
R/W
6 5
0 0
TI000 (P00)
RxD6 (P14)
INTP0 (P120)
RxD6 (P14)
Figure 13-12. Format of Port Mode Register 1 (PM1)
R/W
6 5 4
PM16 PM15 PM14
P1n pin I/O mode selection (n = 0 to 7)
User's Manual U16227EJ2V0UD
4 3 2
0 0 0
TI000 input source selection
INTP0 input source selection
3 2 1
PM13 PM12 PM11
1 0
ISC1 ISC0
0
PM10
275