Muratec F-110 Field Engineering Manual page 54

COMPATIBILITY HARDWARE HANDSHAKING TIMING
PPD( 7: 0)
BUSY
nSTROBE
nACK
ECP HARDWARE HANDSHAKING TIMING (FORWARD)
nSTROBE
BUSY
PPD( 7: 0)
nAUTOFD
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
DATA
1 2 3 4 5
BYTE0
DATA BYTE
6
BYTE1
COMMAND BYTE
Circuit Description
4-21