MC68HC908GT16 Datasheet, PDF (286/412 Pages) Motorola, Inc – Microcontrollers

Enhanced Serial Communications Interface (ESCI)
18.9.8 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: $0017
Bit 7
6
5
4
3
2
1
Read:
PDS2
Write:
PDS1
PDS0 PSSB4 PSSB3 PSSB2 PSSB1
Reset: 0
0
0
0
0
0
0
Figure 18-17. ESCI Prescaler Register (SCPSC)
Bit 0
PSSB0
0
PDS2–PDS0 — Prescaler Divisor Select Bits
These read/write bits select the prescaler divisor as shown in
Table 18-9. Reset clears PDS2–PDS0.
NOTE:
The setting of ‘000’ will bypass this prescaler. It is not recommended to
bypass the prescaler while ENSCI is set, because the switching is not
glitch free.
Table 18-9. ESCI Prescaler Division Ratio
PS[2:1:0]
000
001
010
0 11
100
101
11 0
111
Prescaler Divisor (PD)
Bypass this prescaler
2
3
4
5
6
7
8
Technical Data
286
MC68HC908GT16 • MC68HC908GT8 — Rev. 2
Enhanced Serial Communications Interface (ESCI) Module
MOTOROLA