st2064b Sitronix Technology Corporation, st2064b Datasheet - Page 22
st2064b
Manufacturer Part Number
st2064b
Description
8 Bit Microcontroller With 64k Bytes Rom
Manufacturer
Sitronix Technology Corporation
Datasheet
1.ST2064B.pdf
(57 pages)
- Current page: 22 of 57
- Download datasheet (895Kb)
12.2 Base timer
12.2.1 Function Description
Base timer is an 8-bit up counting timer. When it overflows from
$FF to $00, a timer interrupt request IRBT will be generated.
12.2.2 Base Timer Clock Source Control
Several clock sources can be selected for Base Timer. Please
refer to TABLE 12-3
Ver. 3.0
Note: TCLK will stop when an ‘ 0’ is written to SENA (PRS[6]).
* SENA
X
X
X
X
0
1
1
1
1
1
1
1
1
PRES
PREW
BTM[3]
BTM[3]
BTM[1~0]
BTM[2~0]
X
0
0
0
0
0
0
0
0
1
1
1
1
TCLK/65536
TCLK/32768
TCLK/8192
TCLK/2048
OSCX/64
OSCX/16
OSCX/256
OSCX/4
TCLK/256
TCLK/32
TCLK/8
TCLK/2
BTM[2]
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN0
IN1
IN2
IN3
X
0
0
0
0
1
1
1
1
0
0
0
0
TABLE 12-3 Clock Sources Of Base Timer
MUX 8-1
MUX4-1
FIGURE 12-2 Structure Of Base Timer
SEL
SEL
OUT
OUT
BTM[1]
X
0
0
1
1
0
0
1
1
0
0
1
1
22/57
BTM[0]
Please refer to FIGURE 12-2
IN0
IN1
X
0
1
0
1
0
1
0
1
0
1
0
1
MUX
SEL
OUT
Base Timer source clock
8 Bit - UP Counter
CLOCK
STOP
TCLK / 65536
TCLK / 32768
TCLK / 8192
TCLK / 2048
TCLK / 256
TCLK / 32
TCLK / 8
TCLK / 2
OSCX / 256
OSCX / 64
OSCX / 16
OSCX / 4
IRBT
ST2064B
5/8/09
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