MC68HC705B16CFN

Manufacturer Part NumberMC68HC705B16CFN
DescriptionIC MCU 2.1MHZ 15K OTP 52-PLCC
ManufacturerFreescale Semiconductor
SeriesHC05
MC68HC705B16CFN datasheet
 

Specifications of MC68HC705B16CFN

Core ProcessorHC05Core Size8-Bit
Speed2.1MHzConnectivitySCI
PeripheralsPOR, WDTNumber Of I /o32
Program Memory Size15KB (15K x 8)Program Memory TypeOTP
Eeprom Size256 x 8Ram Size352 x 8
Voltage - Supply (vcc/vdd)4.5 V ~ 5.5 VData ConvertersA/D 8x8b
Oscillator TypeInternalOperating Temperature-40°C ~ 85°C
Package / Case52-PLCCLead Free Status / RoHS StatusContains lead / RoHS non-compliant
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6.11.5
Baud rate register (BAUD)
The baud rate register provides the means to select two different or equivalent baud rates for the
transmitter and receiver.
SCI baud rate (BAUD)
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.
6
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
Freescale
6-18
Address
bit 7
bit 6
bit 5
$000D
SCP1
SCP0
SCT2
Table 6-3 First prescaler stage
Prescaler
SCP1
SCP0
division ratio (NP)
0
0
0
1
1
0
1
1
Table
6-4.
Table 6-4 Second prescaler stage (transmitter)
SCT2
SCT1
SCT0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
SERIAL COMMUNICATIONS INTERFACE
bit 4
bit 3
bit 2
bit 1
bit 0
SCT1
SCT0
SCR2 SCR1 SCR0 00uu uuuu
1
3
4
13
Transmitter
division ratio (NT)
1
2
4
8
16
32
64
128
MC68HC05B6
Rev. 4.1
State
on reset