NEC UPD703116 User Manual page 304

(5) Signal edge selection registers 10, 11 (SESA10, SESA11)
The SESA1n register is used to specify the valid edge of external interrupt requests from external pins
(INTP100, INTP101, INTP110, INTP111, TIUD10, TIUD11, TCUD10, TCUD11, TCLR10, TCLR11). The
correspondences between each register and the external interrupt requests it controls are as follows.
• SESA10: TIUD10, TCUD10, TCLR10, INTP100, INTP101
• SESA11: TIUD11, TCUD11, TCLR11, INTP110, INTP111
The valid edge (rising edge, falling edge, or both edges) can be specified independently for each pin.
SESA1n can be read/written in 8-bit or 1-bit units.
Cautions 1. Changing the values of the SESA1n register bits during TM1n operation (TM1CEn bit =
1) is prohibited.
2. Be sure to set (to 1) the TM1CEn bit of timer control registers 10, 11 (TMC10, TMC11)
even when timer 1 is not used and the TCUD10/INTP100, TCLR10/INTP101,
TCUD11/INTP110, and TCLR11/INTP111 pins are used as INTP100, INTP101, INTP110,
and INTP111.
7 6
SESA10 TESUD01 TESUD00
TIUD10, TCUD10
7 6
SESA11 TESUD11 TESUD10
TIUD11, TCUD11
Bit position Bit name
7, 6 TESUDn1,
TESUDn0
Remark n = 0, 1
304
CHAPTER 9 TIMER/COUNTER FUNCTION
5 4 3
CESUD01 CESUD00 IES1011
TCLR10 INTP101
5 4 3
CESUD11 CESUD10 IES1111
TCLR11 INTP111
Specifies valid edge of pins TIUD10, TIUD11, TCUD10, TCUD11.
TESUDn1 TESUDn0
0
0
1
1
Cautions 1. The set values of the TESUDn1 and TESUDn0 bits are only valid
in UDC mode A and UDC mode B.
2. If mode 4 is specified as the operation mode of TM1n (specified
with PRM12 to PRM10 bits of PRM1n register), the valid edge
specifications for pins TIUD1n and TCUD1n (bits TESUDn1 and
TESUDn0) are not valid.
User's Manual U14492EJ5V0UD
2 1 0
IES1010 IES1001 IES1000
INTP100
2 1 0
IES1110 IES1101 IES1100
INTP110
Function
Valid edge
0 Falling edge
1 Rising edge
0 Setting prohibited
1 Both rising and falling edges
(1/2)
Address Initial value
FFFFF5EDH 00H
Address Initial value
FFFFF60DH 00H