st2064b Sitronix Technology Corporation, st2064b Datasheet - Page 20

• Manufacturer Part Number: st2064b
• Description: 8 Bit Microcontroller With 64k Bytes Rom
• Manufacturer: Sitronix Technology Corporation

1
12.1 Prescaler
12.1.1 Function Description
The ST2064B has three timers, Base timer, Timer 0 and Timer
1, and two prescalers PRES and PREW. There are two clock
sources, SYSCK and INTX, for PRES and one clock source,
Ver. 3.0
1
Address Name
2
2
SYSCK
$03C
$021
$023
$024
$025
$026
$027
$030
$03E
.
.
SENT
INTX
T
T
I
I
M
M
BTM
PRS
T0M
T0C
T1M
T1C
SYS
IREQ
IENA
IN0
IN1
E
E
MUX
R
R
SEL
SRES-PULSE
/
/
E
E
O
V
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
V
OSCX
RESET
SENA
W
W
R
TCLK
E
E
N
N
T
T
PRS[7]
T0C[7]
T1C[7]
SRES
XSEL
Bit 7
ENABLE
CLEAR
RESET
CK
CK
C
C
-
-
-
-
-
O
O
U
U
PRES
PREW
PRS[6]
T0C[6]
T1C[6]
SENA
OSTP
Bit 6
N
FIGURE 12-1 Structure Of Two Prescalers
N
TABLE 12-1 Summary of Timer Registers
-
-
-
-
-
OUTPUT
OUTPUT
T
T
E
E
R
PRS[5]
R
T0M[5]
T0C[5]
T1C[5]
SENT
XSTP
Bit 5
IRBT
IEBT
-
-
TCLK/65536
TCLK/32768
TCLK/8192
TCLK/2048
TCLK/256
TCLK/32
TCLK/8
TCLK/2
OSCX/256
OSCX/128
OSCX/64
OSCX/32
OSCX/16
OSCX/4
PRS[4]
T0M[4]
T1M[4]
20/57
T0C[4]
T1C[4]
TEST
Bit 4
IRPT
IEPT
-
-
OSCX, for PREW. Refer to FIGURE 12-1
BTM[3]
PRS[3]
T1M[3]
T0C[3]
T1C[3]
WSKP
Bit 3
IRT1
IET1
-
-
BTM[2]
PRS[2]
T0M[2]
T1M[2]
T0C[2]
T1C[2]
WAIT
Bit 2
IRT0
IET0
-
BTM[1]
PRS[1]
T0M[1]
T1M[1]
IRDAC
IEDAC
T0C[1]
T1C[1]
Bit 1
-
-
BTM[0]
PRS[0]
T0M[0]
T1M[0]
T0C[0]
T1C[0]
Bit 0
IRX
IEX
-
-
BASE TIMER
TIMER 0
TIMER 1
- - - - 0000
0000 0000
000 - - - - -
0000 0000
0000 0000
- -00 -000
0000 00- -
- - -0 0000
- -00 0000
- -00 0000
Default
ST2064B
5/8/09