saa569x NXP Semiconductors, saa569x Datasheet - Page 26

• Manufacturer Part Number: saa569x
• Description: Enhanced Tv Microcontrollers With On-screen Display Osd
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2002 May 06
Timer 1 High byte (TH1)
TH17 to TH10
Timer 2 High byte (TH2)
TH27 to TH20
Timer 0 Low byte (TL0)
TL07 to TL00
Timer 1 Low byte (TL1)
TL17 to TL10
Timer 2 Low byte (TL2)
TL27 to TL20
Timer/counter Mode Control (TMOD)
GATE
C/T
M1 to M0
GATE
C/T
M1 to M0
Timer 2 Mode Control (T2MOD)
T2RD
T2OE
DCEN
Enhanced TV microcontrollers with
On-Screen Display (OSD)
BITS
8 MSBs of Timer 1 16-bit counter
8 MSBs of Timer 2 16-bit counter
8 LSBs of Timer 0 16-bit counter
8 LSBs of Timer 1 16-bit counter
8 LSBs of Timer 2 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
mode control bits Timer/counter 0; M<1:0>:
Timer 2 Read flag: this bit is set by hardware if following TL2 read and before
TH2 read, TH2 is incremented; it is reset on the trailing edge of next TL2 read
Timer 2 output enable bit: when set, pin T2 is configured as a clock output
Down count enable flag: when set, this allows Timer 2 to be configured as an
up/down Counter
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
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 TH0
11 = one 8-bit time interval or event Counter and one 8-bit time interval Counter
26
FUNCTION
SAA567x; SAA569x
Objective specification