Rev. 1.0, 02/00, page 685 of 1141
26.13.2
Block Diagram
Figure 26.47 shows a block diagram of the CTL circuit.
+ -
PB-CTL
FW/RV
CTL(-)
CTL(+)
Schmitt
amplifier
CTL mode
CTL
detector
Duty dis-
criminator
Bit pattern
register
VISS detect
VISS
control circuit
VISS write
Duty I/O flag
Write control
circuit
REC-
CTL amplifier
Internal bus
REF30X
IRRCTL
Figure 26.47 Block Diagram of CTL Circuit