HE847701 Datasheet, PDF (20/29 Pages) King blillion Electronics Co.,Ltd. – 8-bit Micro-controller

King Billion Electronics Co., Ltd
駿億電子股份有限公司
HE847701
HE80000 SERIES
The contents of T1H and
T1L almost loaded into T1H
T1L
Timer1 immediately
when Timer1 is turned on
after reset.
"Timer1 Counter"
decreases 1
Auto reload when
Timer1 underflow
No
Count TO
0xFFFFh
Start Timer1
Yes
Interrupt Request.
T1_INT
The Timer1 related control registers are list as below:
Register Address
IER 0x02
T1L 0x03
T1H 0x04
OP1 0x09
Field
TC1_IER
T1L[7:0]
T1H[7:0]
TC1E
Bit position Mode
Description
2
R/W 0: TC1 interrupt is disabled. (default)
1: TC1 interrupt is enabled.
7~0
W Low byte of TC1 pre-load value
7~0
W High byte of TC1 pre-load value
2
R/W 0: TC1 is disabled. (default)
1: TC1 is enabled.
12. Timer2
Timer2 is similar in structure to Timer1 except that clock source of Timer2 comes from the system clock
“Fsys”/1.5. The system clock “Fsys” varies depending on the operation modes of the MCU.
The Timer2 consists of two 8-bit write-only preload registers T2H and T2L and 16-bit down counter. If
Timer2 is enabled, counter will decrement by one with each incoming clock pulse. Timer2 interrupt will
be generated when the counter underflows - counts down to FFFFH. And it will be automatically reloaded
March 26, 2004
Page 20 of 29
V1.03
This specification is subject to change without notice. Please contact sales person for the latest version before use.