SAA5531 Philips Semiconductors, SAA5531 Datasheet - Page 23

• Manufacturer Part Number: SAA5531
• Description: Enhanced TV microcontrollers with On-Screen Display OSD
• Manufacturer: Philips Semiconductors

Philips Semiconductors
2000 Feb 23
Timer/Counter Control Register (TCON)
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
14-bit PWM MSB Register (TDACH)
TPWE
TD13 to TD8
14-bit PWM LSB Register (TDACL)
TD7 to TD0
Timer 0 High byte (TH0)
TH07 to TH00
Timer 1 High byte (TH1)
TH17 to TH10
Timer 0 Low byte (TL0)
TL07 to TL00
Timer 1 Low byte (TL1)
TL17 to TL10
Timer/Counter Mode Control (TMOD)
GATE
C/T
M1 to M0
GATE
C/T
Enhanced TV microcontrollers with
On-Screen Display (OSD)
BIT
Timer 1 overflow flag. Set by hardware on timer/counter overflow. Cleared by
hardware when processor vectors to interrupt routine.
Timer 1 run control bit. Set/cleared by software to turn timer/counter on/off.
Timer 0 overflow flag. Set by hardware on timer/counter overflow. Cleared by
hardware when processor vectors to interrupt routine.
Timer 0 run control bit. Set/cleared by software to turn timer/counter on/off.
Interrupt 1 edge flag. Both edges generate flag. Set by hardware when external
interrupt edge detected. Cleared by hardware when interrupt processed.
Interrupt 1 type control bit. Set/cleared by software to specify edge/low level
triggered external interrupts.
Interrupt 0 Edge l flag. Set by hardware when external interrupt edge detected.
Cleared by hardware when interrupt processed.
Interrupt 0 type flag. Set/cleared by software to specify falling edge/low level
triggered external interrupts.
activate this 14-bit PWM (logic 1)
6 MSBs of 14-bit number to be output by the 14-bit PWM
8 LSBs of 14-bit number to be output by the 14-bit PWM
8 MSBs of Timer 0 16-bit counter
8 MSBs of Timer 1 16-bit counter
8 LSBs of Timer 0 16-bit counter
8 LSBs of Timer 1 16-bit counter
gating control Timer/Counter 1
Counter/Timer 1 selector
mode control bits timer/counter 1; M<1:0>:
Gating control Timer/Counter 0
Counter/Timer 0 selector
00 = 8-bit timer or 8-bit counter with divide-by-32 prescaler
01 = 16-bit time interval or event counter
10 = 8-bit time interval or event counter with automatic reload upon overflow;
reload value stored in TH1
11 = stopped
23
FUNCTION
Preliminary specification
SAA55xx