MC908GR32AVFAE Datasheet, PDF (175/314 Pages) Freescale Semiconductor, Inc – Microcontrollers

I/O Registers
SCP1 and SCP0 — ESCI Baud Rate Register Prescaler Bits
These read/write bits select the baud rate register prescaler divisor as shown in Table 13-7. Reset
clears SCP1 and SCP0.
Table 13-7. ESCI Baud Rate Prescaling
SCP[1:0]
00
01
10
11
Baud Rate Register
Prescaler Divisor (BPD)
1
3
4
13
SCR2–SCR0 — ESCI Baud Rate Select Bits
These read/write bits select the ESCI baud rate divisor as shown in Table 13-8. Reset clears
SCR2–SCR0.
Table 13-8. ESCI Baud Rate Selection
SCR[2:1:0]
000
001
010
011
100
101
110
111
Baud Rate Divisor (BD)
1
2
4
8
16
32
64
128
13.8.8 ESCI Prescaler Register
The ESCI prescaler register (SCPSC) together with the ESCI baud rate register selects the baud rate for
both the receiver and the transmitter.
NOTE
There are two prescalers available to adjust the baud rate. One in the ESCI
baud rate register and one in the ESCI prescaler register.
Address:
Read:
Write:
Reset:
$0009
Bit 7
PDS2
0
6
PDS1
0
;
5
PDS0
0
4
PSSB4
0
3
PSSB3
0
2
PSSB2
0
1
PSSB1
0
Bit 0
PSSB0
0
Figure 13-18. ESCI Prescaler Register (SCPSC)
MC68HC908GR60A • MC68HC908GR48A • MC68HC908GR32A Data Sheet, Rev. 5
Freescale Semiconductor
175