MC68HC11EA9 Datasheet, PDF (48/58 Pages) Motorola, Inc – 8 BIT HCMOS SINGLE CHIP MICROCONTOROLLER WITH A/D CONVERTER

Freescale Semiconductor, Inc.
TRANSMITTER
CLOCK
(FROM MODULUS BAUD
RATE GENERATOR)
$x076
$x077
R8 T8 — — — — — —
SCDRH Tx/Rx DATA HIGH
7 65 432 10
SCDRL Tx/Rx DATA LOW
(WRITE ONLY)
10 (11) - BIT Tx SHIFT REGISTER
H (8) 7 6 5 4 3 2 1 0 L
DDD1
PIN BUFFER
PD1
AND CONTROL
TxD
PARITY
GENERATOR
TRANSMITTER
CONTROL LOGIC
FORCE PIN
DIRECTION (OUT)
SCCR1 SCI CONTROL 1
SCSR1 SCI STATUS 1
TDRE
TIE
TC
TCIE
SCCR2 SCI CONTROL 2
SCI Rx
REQUESTS
SCI INTERRUPT
REQUEST
Figure 12 SCI Transmitter Block Diagram
INTERNAL
DATA BUS
EA9 SCI TX BLOCK
MC68HC11EA9
48
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MC68HC11EA9TS/D
Go to: www.freescale.com