IBM MiEM78P468L Benutzerhandbuch
EM78P468N/EM78P468L
8-Bit Microcontroller
Product Specification (V1.5) 02.15.2007
• 19
(This specification is subject to change without further notice)
Bit 2 (/WUE8L):
0/1
→ enable/disable P8.0~P8.3 pin change wake-up function
Bit 1 (/WUE6H):
0/1
→ enable/disable P6.4~P6.7 pin change wake-up function
Bit 0 (/WUE6L):
0/1
→ enable/disable P6.0~P6.3 pin change wake-up function
* Port 6 and Port 8 must not be set as input floating when wake-up function is
enabled. “Enable” is the initial state of wake-up function.
6.2.14 IOC71/TCCCR (TCC Control Register)
(Address: 07h, Bit 0 of R5 = “1”)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
INT_EDGE INT
TS
TE PSRE TCCP2 TCCP1 TCCP0
Bit 7 (INT_EDGE):
INT_EDGE = “0”:
Interrupt on the rising edge of P5.4/INT0 pin
INT_EDGE = “1”:
Interrupt on the falling edge of P5.4/INT0 pin
Bit 6 (INT):
INT enable flag, this bit is read only
INT = “0”:
interrupt masked by DISI or hardware interrupt
INT = “1”:
interrupt enabled by ENI/RETI instructions
Bit 5 (TS):
TCC signal source
TS = “0”:
internal instruction cycle clock
TS = “1”:
transition on TCC pin, TCC period > internal instruction clock period
Bit 4 (TE):
TCC signal edge
TE = “0”:
incremented by TCC pin rising edge
TE = “1”:
incremented by TCC pin falling edge
Bits 3~0 (PSRE, TCCP2 ~ TCCP0):
TCC prescaler bits.
PSRE
TCCP2
TCCP1
TCCP0
TCC Rate
0
×
×
× 1:1
1 0 0 0 1:2
1 0 0 1 1:4
1 0 1 0 1:8
1 0 1 1 1:16
1 1 0 0 1:32
1 1 0 1 1:64
1 1 1 0
1:128
1 1 1 1
1:256