em78p468l ELAN Microelectronics Corp, em78p468l Datasheet - Page 25

• Manufacturer Part Number: em78p468l
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.5) 02.15.2007
(This specification is subject to change without further notice)
6.2.14 IOC71/TCCCR (TCC Control Register)
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.
Bit 7 (INT_EDGE):
Bit 6 (INT): INT enable flag, this bit is read only
Bit 5 (TS): TCC signal source
Bit 4 (TE): TCC signal edge
Bits 3~0 (PSRE, TCCP2 ~ TCCP0): TCC prescaler bits.
INT_EDGE
Bit 7
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
INT = “0”: interrupt masked by DISI or hardware interrupt
INT = “1”: interrupt enabled by ENI/RETI instructions
TS = “0”: internal instruction cycle clock
TS = “1”: transition on TCC pin, TCC period > internal instruction clock period
TE = “0”: incremented by TCC pin rising edge
TE = “1”: incremented by TCC pin falling edge
PSRE
(Address: 07h, Bit 0 of R5 = “1”)
0
1
1
1
1
1
1
1
1
Bit 6
INT
TCCP2
×
0
0
0
0
1
1
1
1
Bit 5
TS
Bit 4
TE
TCCP1
×
0
0
1
1
0
0
1
1
PSRE
Bit 3
EM78P468N/EM78P468L
TCCP0
TCCP2
Bit 2
×
0
1
0
1
0
1
0
1
8-Bit Microcontroller
TCCP1
Bit 1
TCC Rate
1:128
1:256
1:16
1:32
1:64
1:1
1:2
1:4
1:8
TCCP0
Bit 0
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