
I/O Registers
MC68HC908GR8 MC68HC908GR4 Data Sheet, Rev. 7
Freescale Semiconductor
177
18.8.2 SCI Control Register 2
SCI control register 2:
Enables the following CPU interrupt requests:
–
Enables the SCTE bit to generate transmitter CPU interrupt requests
–
Enables the TC bit to generate transmitter CPU interrupt requests
–
Enables the SCRF bit to generate receiver CPU interrupt requests
–
Enables the IDLE bit to generate receiver CPU interrupt requests
Enables the transmitter
Enables the receiver
Enables SCI wakeup
Transmits SCI break characters
SCTIE — SCI Transmit Interrupt Enable Bit
This read/write bit enables the SCTE bit to generate SCI transmitter CPU interrupt requests. Reset
clears the SCTIE bit.
1 = SCTE enabled to generate CPU interrupt
0 = SCTE not enabled to generate CPU interrupt
TCIE — Transmission Complete Interrupt Enable Bit
This read/write bit enables the TC bit to generate SCI transmitter CPU interrupt requests. Reset clears
the TCIE bit.
1 = TC enabled to generate CPU interrupt requests
0 = TC not enabled to generate CPU interrupt requests
SCRIE — SCI Receive Interrupt Enable Bit
This read/write bit enables the SCRF bit to generate SCI receiver CPU interrupt requests. Reset clears
the SCRIE bit.
1 = SCRF enabled to generate CPU interrupt
0 = SCRF not enabled to generate CPU interrupt
Table 18-5. Character Format Selection
Control Bits
Character Format
M
PEN and PTY
Start Bits
Data Bits
Parity
Stop Bits
Character Length
0
0X
1
8
None
1
10 bits
1
0X
1
9
None
1
11 bits
0
10
1
7
Even
1
10 bits
0
11
1
7
Odd
1
10 bits
1
10
1
8
Even
1
11 bits
1
11
1
8
Odd
1
11 bits
Address:
$0014
Bit 7
654321
Bit 0
Read:
SCTIE
TCIE
SCRIE
ILIE
TE
RE
RWU
SBK
Write:
Reset:
00000000
Figure 18-10. SCI Control Register 2 (SCC2)