mc68hc908mr8 Freescale Semiconductor, Inc, mc68hc908mr8 Datasheet - Page 276

• Manufacturer Part Number: mc68hc908mr8
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Serial Communications Interface (SCI)
13.9.6 SCI Data Register
13.9.7 SCI Baud Rate Register
Technical Data
276
The SCI data register (SCDR) 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.
Reset:
R7/T7:R0/T0 — Receive/Transmit Data Bits
The SCI baud rate register (SCBR) selects the baud rate for both the
receiver and the transmitter.
Reset:
dress:
dress:
Read:
Read:
Write:
Write:
Ad-
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.
Ad-
$003D
$003E
Serial Communications Interface (SCI)
Bit 7
Bit 7
R7
T7
R
R
0
0
Figure 13-14. SCI Baud Rate Register (SCBR)
Figure 13-13. SCI Data Register (SCDR)
= Reserved
R6
T6
R
6
6
0
0
SCP1
R5
T5
5
5
0
Unaffected by reset
SCP0
R4
T4
4
4
0
R3
T3
R
3
3
0
0
MC68HC908MR8 — Rev 4.1
SCR2
R2
T2
Freescale Semiconductor
2
2
0
SCR1
R1
T1
1
1
0
SCR0
Bit 0
Bit 0
R0
T0
0