MC68HC711P2CFN4 Freescale Semiconductor, MC68HC711P2CFN4 Datasheet - Page 95

• Manufacturer Part Number: MC68HC711P2CFN4
• Description: IC MCU 32K OTP 4MHZ 84-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711P2CFN4

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: MI Bus, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Eeprom Size: 640 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 84-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

5.8.2 SCCR1 — SCI control register 1
MC68HC11P2 — Rev 1.0
SCI 1 control 1 (SCCR1)
The SCCR1 register provides the control bits that determine word length
and select the method used for the wakeup feature.
LOOPS — SCI loop mode enable
WOMS — Wired-OR mode for SCI pins (PD1, PD0)
Freescale Semiconductor, Inc.
Both the transmitter and receiver must be enabled to use the LOOP
mode. When the LOOP mode is enabled, the TXD pin is driven high
(idle line state) if the transmitter is enabled.
Address bit 7
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$0072
1 = SCI transmit and receive are disconnected from TXD and RXD
0 = SCI transmit and receive operate normally.
1 = TXD and RXD are open drains if operating as outputs.
0 = TXD and RXD operate normally.
Target
19200
38400
baud
1200
2400
4800
9600
rate
110
150
300
600
Serial Communications Interface (SCI)
pins, and transmitter output is fed back into the receiver input.
Table 5-1. Example SCI baud rate control values
LOOP
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S
value
2272
1666
Dec
833
416
208
104
52
26
13
WOMS
8 MHz
bit 6
$08E0
$01A0
$00D0
$001A
$000D
$0682
$0341
$0068
$0034
value
Hex
bit 5
0
Crystal frequency (EXTAL)
bit 4
M
value
3409
2500
1250
Dec
625
312
156
78
39
20
12 MHz
WAKE
bit 3
Serial Communications Interface (SCI)
$0D51
$09C4
$009C
$04E2
$0138
$004E
$0271
$0027
$0014
value
Hex
bit 2
ILT
value
bit 1
4545
3333
1666
PE
Dec
833
416
208
104
52
26
13
16 MHz
bit 0
PT
Technical Data
$0D05
$01A0
$00D0
$001A
$000D
$11C1
$0682
$0341
$0068
$0034
value
SCI registers
Hex
0000 0000
on reset
State