MC68HC711P2CFN4 Freescale Semiconductor, MC68HC711P2CFN4 Datasheet - Page 87

• 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

Technical Data — MC68HC11P2
5.1 Contents
5.2 Introduction
MC68HC11P2 — Rev 1.0
Section 5. Serial Communications Interface (SCI)
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
The serial communications interface (SCI) is a universal asynchronous
receiver transmitter (UART). It has a non-return to zero (NRZ) format
(one start, eight or nine data, and one stop bit) that is compatible with
standard RS-232 systems.
The MC68HC11P2 contains three serial communications interfaces, all
having similar operation. For ease of reference, a full description of SCI1
(PD0/RXD1, PD1/TXD1) is given first, followed by summaries for
and SCI3, detailing their differences.
Freescale Semiconductor, Inc.
For More Information On This Product,
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Data format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Transmit operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Receive operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Wakeup feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
SCI error detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
SCI registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Status flags and interrupts . . . . . . . . . . . . . . . . . . . . . . . . . 101
Additional SCI subsystems . . . . . . . . . . . . . . . . . . . . . . . . . 104
Serial Communications Interface (SCI)
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Technical Data
SCI2