IBM MiEM78P468N manual IOCA1/HLPWTCR High/Low Pulse Width Timer Control Register, Counter 1 Scale

EM78P468N/EM78P468L

8-Bit Microcontroller

Bit 3 (CNT1S): Counter 1 clock source select 0/1 → Fs/ Fm*

Bits 2~0 (CNT1P2 ~ CNT1P20): Counter 1 prescaler select bits

CNT1P2	CNT1P1	CNT1P0	Counter 1 Scale
0	0	0	1:2
0	0	1	1:4
0	1	0	1:8
0	1	1	1:16
1	0	0	1:32
1	0	1	1:64
1	1	0	1:128
1	1	1	1:256

6.2.17 IOCA1/HLPWTCR (High/Low Pulse Width Timer Control Register)

(Address: 0Ah, Bit 0 of R5 = “1”)

Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
LPWTS	LPWTP2	LPWTP1	LPWTP0	HPWTS	HPWTP2	HPWTP1	HPWTP0

Bit 7 (LPWTS): low-pulse width timer clock source select 0/1 → Fs/ Fm*

(*Fs: sub-oscillator clock, Fm: main-oscillator clock)

Bits 6~4 (LPWTP2~ LPWTP0): low-pulse width timer prescaler select bits

LPWTP2	LPWTP1	LPWTP0	Low-pulse Width Timer Scale
0	0	0	1:2
0	0	1	1:4
0	1	0	1:8
0	1	1	1:16
1	0	0	1:32
1	0	1	1:64
1	1	0	1:128
1	1	1	1:256

Bit 3 (HPWTS): high-pulse width timer clock source select 0/1 → Fs/ Fm*

Bits 2~0 (HPWTP2~ HPWTP0): high-pulse width timer prescaler select bits

	HPWTP2	HPWTP1	HPWTP0	High-pulse Width Timer Scale
	0	0	0	1:2
	0	0	1	1:4
	0	1	0	1:8
	0	1	1	1:16
	1	0	0	1:32
	1	0	1	1:64
	1	1	0	1:128
	1	1	1	1:256
Product Specification (V1.5) 02.15.2007				• 21

(This specification is subject to change without further notice)