Справочник Пользователя для IBM MiEM78P468L

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

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

× 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