ST92124JCV1QC データシートの表示（PDF） - STMicroelectronics
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ST92124JCV1QC
STMicroelectronics
ST92124JCV1QC Datasheet PDF : 429 Pages
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STANDARD TIMER (STIM)
STANDARD TIMER (Cont’d)
10.2.4 Register Description
COUNTER HIGH BYTE REGISTER (STH)
R240 - Read/Write
Register Page: 11
Reset value: 1111 1111 (FFh)
7
0
ST.15 ST.14 ST.13 ST.12 ST.11 ST.10 ST.9 ST.8
Bits 7:0 = ST.[15:8]: Counter High-Byte.
COUNTER LOW BYTE REGISTER (STL)
R241 - Read/Write
Register Page: 11
Reset value: 1111 1111 (FFh)
7
0
ST.7 ST.6 ST.5 ST.4 ST.3 ST.2 ST.1 ST.0
STANDARD TIMER CONTROL
(STC)
R243 - Read/Write
Register Page: 11
Reset value: 0001 0100 (14h)
REGISTER
7
0
ST-SP S-C INMD1 INMD2 INEN INTS OUTMD1 OUTMD2
Bit 7 = ST-SP: Start-Stop Bit.
This bit is set and cleared by software.
0: Stop counting
1: Start counting
Bit 6 = S-C: Single-Continuous Mode Select.
This bit is set and cleared by software.
0: Continuous Mode
1: Single Mode
Bits 7:0 = ST.[7:0]: Counter Low Byte.
Writing to the STH and STL registers allows the
user to enter the standard timer constant from 1
(0000h) to 65536 (FFFFh). Reading these regis-
ters provides the counter's current value. Thus it is
possible to read the counter on-the-fly.
STANDARD TIMER PRESCALER REGISTER
(STP)
R242 - Read/Write
Register Page: 11
Reset value: 1111 1111 (FFh)
7
0
STP.7 STP.6 STP.5 STP.4 STP.3 STP.2 STP.1 STP.0
Bits 7:0 = STP.[7:0]: Prescaler.
The Prescaler value for the Standard Timer is pro-
grammed into this register. When reading the STP
register, the returned value corresponds to the
programmed data instead of the current data.
00h: No prescaler
01h: Divide by 2
FFh: Divide by 256
Bits 5:4 = INMD[1:2]
Bit 3 = INEN
These 3 bits select the clock source.
INMD1 INMD2 INEN
0
0
1
X
X
0
Clock input
CLOCK2/1024
INTCLK/4
Bit 2 = INTS: Interrupt Selection.
0: Standard Timer interrupt enabled
1: Standard Timer interrupt is disabled and the ex-
ternal interrupt pin is enabled.
Bits 1:0 = OUTMD[1:2]: Output Mode Selection.
These bits select the output functions as described
in Section 10.2.2.3.
OUTMD1 OUTMD2 Mode
0
0
No output mode
0
1
Square wave output mode
1
x
PWM output mode
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