mc68hc708mp16 Freescale Semiconductor, Inc, mc68hc708mp16 Datasheet - Page 314

• Manufacturer Part Number: mc68hc708mp16
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Serial Communications Interface Module (SCI)
14.8.6 SCI Data Register
14.8.7 SCI Baud Rate Register
Technical Data
314
Address:
Address:
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.
R7/T7:R0/T0 — Receive/Transmit Data Bits
The baud rate register selects the baud rate for both the receiver and the
transmitter.
SCP1 and SCP0 — SCI Baud Rate Prescaler Bits
Reset:
Reset:
Read:
Write:
Read:
Write:
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.
These read/write bits select the baud rate prescaler divisor as shown
in
Serial Communications Interface Module (SCI)
Table
$003D
$003E
Bit 7
Bit 7
R7
T7
0
Figure 14-14. SCI Baud Rate Register (SCBR)
14-5. Reset clears SCP1 and SCP0.
Figure 14-13. SCI Data Register (SCDR)
= Unimplemented
R6
T6
6
6
0
SCP1
R5
T5
5
5
0
Unaffected by reset
SCP0
R4
T4
4
4
0
R3
T3
R
R
3
3
0
MC68HC708MP16
SCR2
= Reserved for Factory Test
R2
Freescale Semiconductor
T2
2
2
0
SCR1
R1
T1
1
1
0
—
Rev. 3.1
SCR0
Bit 0
Bit 0
R0
T0
0