Top-Of-Form Counter Block Diagram - Printronix p300 Maintenance Manual

RCLK
1 2 3 4
DECODER
(12)
CLR
1 2 4 8 16 32 64
NVRDY
NFMRS
2–42
A0
A7
E8
E9
CLK
Figure 2–26. Top–of–Form Counter Block Diagram
W1
W3
W2
D1
D2
256 X 4
PROM
D3
D4
(SKIP–OVER PERFORATION)
FMFD
F–F
NFMD
EFF
F–F
NEFF
P300/P600 Principles of Operation
TOF
TO PAPER
VELOCITY
TO ROW
COUNTER
LOGIC