MC68HC705X32CFU Freescale Semiconductor, MC68HC705X32CFU Datasheet - Page 120
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MC68HC705X32CFU
Manufacturer Part Number
MC68HC705X32CFU
Description
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68HC705X32CFU.pdf
(232 pages)
Specifications of MC68HC705X32CFU
Cpu Family
HC05
Device Core Size
8b
Frequency (max)
4MHz
Interface Type
SCI
Program Memory Type
EPROM
Program Memory Size
32KB
Total Internal Ram Size
528Byte
# I/os (max)
32
Number Of Timers - General Purpose
1
Operating Supply Voltage (typ)
5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
4.5V
On-chip Adc
8-chx8-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
64
Package Type
PQFP
Lead Free Status / Rohs Status
Supplier Unconfirmed
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68HC705X32CFU4
Manufacturer:
FREESCALE
Quantity:
20 000
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7
7.11.5
The baud rate register provides the means to select two different or equivalent baud rates for the
transmitter and receiver.
SCP1, SCP0 — Serial prescaler select bits
These read/write bits determine the prescale factor, NP, by which the internal processor clock is
divided before it is applied to the transmitter and receiver rate control dividers, NT and NR. This
common prescaled output is used as the input to a divider that is controlled by the SCR0–SCR2
bits for the SCI receiver, and by the SCT0–SCT2 bits for the transmitter.
SCT2, SCT1, SCT0 — SCI rate select bits (transmitter)
These three read/write bits select the baud rates for the transmitter. The prescaler output is divided
by the factors shown in
SCI baud rate (BAUD)
Baud rate register (BAUD)
Freescale Semiconductor, Inc.
Table
Table 7-4 Second prescaler stage (transmitter)
For More Information On This Product,
SERIAL COMMUNICATIONS INTERFACE
SCT2
0
0
0
0
1
1
1
1
Address
$000D
7-4.
Table 7-3 First prescaler stage
SCP1
Go to: www.freescale.com
0
0
1
1
SCP1 SCP0
SCT1
bit 7
0
0
1
1
0
0
1
1
SCP0
0
1
0
1
bit 6
SCT0
0
1
0
1
0
1
0
1
SCT2
bit 5
division ratio (NP)
Prescaler
division ratio (NT)
SCT1
bit 4
13
1
3
4
Transmitter
128
16
32
64
SCT0 SCR2 SCR1 SCR0 00uu uuuu
1
2
4
8
bit 3
bit 2
bit 1
MC68HC05X16
bit 0
on reset
State
Rev. 1
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