MC68HC11EA9 Datasheet, PDF (49/58 Pages) Motorola, Inc – 8 BIT HCMOS SINGLE CHIP MICROCONTOROLLER WITH A/D CONVERTER

Freescale Semiconductor, Inc.
RECEIVER
CLOCK
(FROM MODULUS
BAUD RATE
GENERATOR)
PD0
RxD
DDD0
÷16
PIN BUFFER
AND CONTROL
DATA
RECOVERY
RE
(DISABLES
PIN DRIVER)
SCSR2 SCI STATUS 2
M
WAKEUP
LOGIC
PARITY
DETECT
10 (11) - BIT
Rx SHIFT REGISTER
(8) 7 6 5 4 3 2 1 0
MSB
ALL ONES
RWU
SCCR1 SCI CONTROL 1
SCSR1 SCI STATUS 1
RDRF
RIE
IDLE
ILIE
OR
RIE
R8 T8 — — — — — — _$x076
SCDRH Tx/Rx DATA HIGH
7 6 5 4 3 2 1 0 _$x077
SCDRL Tx/Rx DATA LOW
(READ ONLY)
SCCR2 SCI CONTROL 2
SCI Tx
REQUESTS
SCI INTERRUPT
REQUEST
Figure 13 SCI Receiver Block Diagram
INTERNAL
DATA BUS
EA9 SCI RX BLOC
MC68HC11EA9
MC68HC11EA9TS/D
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