MC68HC708MP16CFU

Manufacturer Part NumberMC68HC708MP16CFU
ManufacturerFreescale Semiconductor, Inc
MC68HC708MP16CFU datasheet
 


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Page 314/398:

SCI Data Register

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Serial Communications Interface Module (SCI)
14.8.6 SCI Data Register
The SCI data register is the buffer between the internal data bus and the
receive and transmit shift registers. Reset has no effect on data in the
SCI data register.
Address:
Read:
Write:
Reset:
R7/T7:R0/T0 — Receive/Transmit Data Bits
Reading address $003D accesses the read-only received data bits,
R7:R0. Writing to address $003D writes the data to be transmitted,
T7:T0. Reset has no effect on the SCI data register.
14.8.7 SCI Baud Rate Register
The baud rate register selects the baud rate for both the receiver and the
transmitter.
Address:
Read:
Write:
Reset:
SCP1 and SCP0 — SCI Baud Rate Prescaler Bits
These read/write bits select the baud rate prescaler divisor as shown
in
Table
Technical Data
314
Serial Communications Interface Module (SCI)
$003D
Bit 7
6
5
4
R7
R6
R5
R4
T7
T6
T5
T4
Unaffected by reset
Figure 14-13. SCI Data Register (SCDR)
$003E
Bit 7
6
5
4
SCP1
SCP0
0
0
0
0
= Unimplemented
Figure 14-14. SCI Baud Rate Register (SCBR)
14-5. Reset clears SCP1 and SCP0.
3
2
1
Bit 0
R3
R2
R1
R0
T3
T2
T1
T0
3
2
1
Bit 0
R
SCR2
SCR1
SCR0
0
0
0
0
R
= Reserved for Factory Test
MC68HC708MP16
Rev. 3.1
Freescale Semiconductor