SDA5252 SIEMENS [Siemens Semiconductor Group], SDA5252 Datasheet - Page 83

• Manufacturer Part Number: SDA5252
• Description: TVTEXT 8-Bit Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Timer/Counter Mode Register
Timer 0/1 Mode Register
Default after reset: 00
GATE
C/T
Table 21
M1
0
0
1
1
Semiconductor Group
(MSB)
GATE
M0
0
1
0
1
C/T
Operating Mode
SAB 8048 timer: “TLx” serves as five-bit prescaler.
16-bit timer/counter: “THx” and “TLx” are cascaded, there is no
prescaler.
8-bit auto-reload timer/counter: “THx” holds a value which is to be
reloaded into “TLx” each time it overflows.
(Timer 0) TL0 is an eight-bit timer/counter controlled by the standard
(Timer 1) timer/counter 1 is stopped.
Timer 1
H
Gating control when set. Timer/counter “x” is enabled only
while “INTx” pin is high and “TRx” control bit is set. When
cleared, timer “x” is enabled, whenever “TRx” control bit is set.
Timer or counter selector. Cleared for timer operation (input
from internal system clock). Set for Counter operation (input
from “Tx” input pin).
M1
timer 0 control bits; TH0 is an eight-bit timer only controlled
by timer 1 control bits.
M0
TMOD
83
GATE
C/T
Timer 0
SFR-Address 89
M1
SDA 525x
1998-04-08
(LSB)
M0
H