MC68HC908GZ8 Datasheet, PDF (246/344 Pages) Motorola, Inc – Microcontrollers

Enhanced Serial Communications Interface (ESCI) Module
SCP1 and SCP0 — ESCI Baud Rate Register Prescaler Bits
These read/write bits select the baud rate register prescaler divisor as shown in
Table 19-8. Reset clears SCP1 and SCP0.
Table 19-8. 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 19-9.
Reset clears SCR2–SCR0.
Table 19-9. 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
19.8.8 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
6
5
4
3
2
1
PDS2
PDS1
PDS0 PSSB4 PSSB3 PSSB2 PSSB1
0
0
0
0
0
0
0
Figure 19-17. ESCI Prescaler Register (SCPSC)
Bit 0
PSSB0
0
Data Sheet
246
Enhanced Serial Communications Interface (ESCI) Module
MC68HC908GZ8
Freescale Semiconductor