参数资料
型号: SM8521
厂商: Sharp Corporation
元件分类: DC/DC变换器
英文描述: 1 watt dc-dc converters
中文描述: 1瓦的DC - DC转换器
文件页数: 31/56页
文件大小: 267K
代理商: SM8521
SM8521
- 31 -
8-BIT TIMER REGISTER
TM0C, TM1C (Control registers)
Bit 7
0
(x = 0, 1)
Bit 7 : Start/stop
Bits 6 to 3 : Set ‘0’
Bits 2 to 0 :
PRESCALER
000
001
010
011
100
101
110
111
TM0D, TM1D (Data register)
Bit 7
TM
X
D7 TM
X
D6 TM
X
D5 TM
X
D4 TM
X
D3 TM
X
D2 TM
X
D1 TM
X
D0
0
(x = 0, 1)
Bits 7 to 0 : Content of counter (read), time con-
stant (write)
NOTES :
After reset, the status of both TM0C and TM1C becomes
0
000B, and both TM0D and TM1D becomes
00000000B.
Every time between the value of 8-bit up counter and the
value of time constant register coincide in timer execution,
output signal inverts.
Clock Timer
Clock timer is for real time clock. Dividing sub-clock
(32.768 kHz), 1 s or 1 min interrupt occurs.
TM
X
C7 TM
X
C6 TM
X
C5 TM
X
C4 TM
X
C3 TM
X
C2 TM
X
C1 TM
X
C0
INPUT CLOCK FOR 8-BIT UP-COUNTER
f
CK
/2
f
CK
/1 024
f
CK
/2 048
f
CK
/4 096
f
CK
/8 192
f
CK
/16 384
f
CK
/32 768
f
CK
/65 536
32.768 kHz
Interrupt
Prescaler
1/60 counter
Data bus
NOTE : In case of run/reset bit is zero, both upper 8 bits in prescaler and all bits in 1/60 counter are reset.
Control register
Selector
1 s
1 min
Fig. 14 Clock Timer Block Diagram
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