MC68HC05F8 Datasheet, PDF (74/126 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor(HCMOS) microcontroller unit

Freescale Semiconductor, Inc.
NCE=0, NIE=0,
IDLE
NCM=1, NCC=1
ENCOOUT pin Hi Z
N
NCE = 1?
Y
STANDBY
N
Write to Encode Data
register?
Y
ENCOOUT Hi Z → Low Level
(Sync with internal transmit clock)
2 bits - Time Delay
Move data from Encode register to encode shift Register
8
NCF 0 → 1 and generate INT if NIE=1
Generate 2 SYNC bits
Encode data in the
Encode register and output
NCC 0 → 1
Generate INT if CIE=1
ENCOOUT Hi Z
Generate 2 bits pause
Generate trailing bit
Y
NCE = 0?
N
Y
Encode register empty?
(NCM = 1?)
N
MOTOROLA
8-4
Figure 8-2 Logic Flow of Encoder Hardware Operation
MANCHESTER ENCODER/DECODER
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MC68HC05F8