3-20
CIRCUIT DESCRIPTION
Samsung Electronics
Repair Manual
1. The host places data on the data lines and indicates a data cycle by setting nAUTOFD
2. Host asserts nSTROBE low to indicate valid data
3. Peripheral acknowledges host by setting BUSY high
4. Host sets nSTROBE high. This is the edge that should be used to clock the data into the Peripheral
5. Peripheral sets BUSY low to indicate that it is ready for the next byte
6. The cycle repeats, but this time it is a command cycle because nAUTOFD is low
PPD( 7: 0)
nSTROBE
BUSY
nACK
DATA
COMPATIBILITY HARDWARE HANDSHAKING TIMING
PPD( 7: 0)
nAUTOFD
nSTROBE
BUSY
BYTE0
BYTE1
COMMAND BYTE
DATA BYTE
1
2
3
4
5
6
ECP HARDWARE HANDSHAKING TIMING (FORWARD)
Summary of Contents for SF-530 Series
Page 87: ...Electronics ...
