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(4) Pin Description
* A : DW5255M*/DW5255RM*, *B : DW370ASM*
Pin Name
Symbol
Description
A* B* A* B* A* B*
1 1 P3.1 T1IC1/CR SYS NTSC OUT for switching SAW filter
K6259
- PAL/SECAM : L
- NTSC : H
2 2 P0.7/Open Drain A0 BUSSTOP I2C BUS STOP IN for Computer
controlled alignment in Factory
( Active Low )
3 3 P0.6/Open Drain A1 SDA Serial data IN/OUT for I2C
4 4 P0.5/Open Drain A2 SCL Serial clock IN/OUT for I2C
5 5 P0.4/Open Drain A3 OPTION #5 #6 Teletext #6
6 6 P0.3/Open Drain A4 OPTION H H West Teletext H : STAND-BY
L H East Teletext L : POWER ON
H L Turkish Teletext
7 7 P0.2/Open Drain A5 OPTION Not Used
8 8 P0.1/Open Drain PWM1-0/ Open Drain OPTION Not Used
9 9 P0.0/Open Drain PWM1-1/ Open Drain LED LED drive OUT
- Stand-by mode : H
- Operating mode : L
( IR reception : pulse )
10 10 VSS VSS ground
11 11 VCC VCC Power Supply
12 12 XTAL1 OSCIN OSCIN Input to inverting osc. Amplifier
13 13 XTAL2 OSCOUT OSCOUT Output of inverting osc. Amplifier
14 14 P4.0/ALE PWM1-2/Open Drain Not Used H : I/M, L : B/D
15 15 RESET RESET/Open Drain RST RESET IN (ACTIVE LOW)
16 16 P1.7/14BIT PWM PWM2-0 VT TUNING VOLTAGE OUT
17 17 P1.6/14BIT PWM PWM2-1 SW H : I/M Not Used
L : B/D
18 18 P1.5/8BIT PWM PWM1-3/Open Drain F/SW Not Used
19 19 P1.4/8BIT PWM PWM1-4/Open Drain Not Used
20 20 P1.3/8BIT PWM PWM1-5/Open Drain MUTE AUDIO MUTE OUT
21 21 P1.2/8BIT PWM TEST GND (Must be tied 0V for DW370M*)
22 P1.1/8BIT PWM Not Used
23 P1.0/8BIT PWM Not Used
24 VSSA VSSA Analog GND for Slicer
25 FIL3 FIL3 PLL Loop Filter I/O for Phase Shifting
26 FIL2 FIL2 PLL Loop Filter I/O for TTX Slicing
27 FIL1 FIL1 PLL Loop Filter I/O for VPS Slicing
28 VCCA VCCA Analog Supply for Slicer
29 IREF IREF Reference Current for Slicer PLLs