System 27Mhz Clock, Reset, Flash R/W Signal - Kenwood DVF-3400-B Service Manual

1. SYSTEM 27MHz CLOCK, RESET, FLASH R/W SIGNAL

1) ZR966 main clock is at 27MHz (X601)
1
2) ZR699 reset is active high
2
3
4
Note: Waveform number shows check points in schematic diagram
FIG 1-1
3.3VA
PWR_CTL
RESET
FIG 1-2
3) RS232 waveform during procedure (Downloading)
5
6
FIG 1-3
4) Flash R/W enable signal during download (Downloading)
7
8
FIG 1-4
TXD
RXD
PRD
PWR