MC68HC11E1CFN3 Freescale Semiconductor, MC68HC11E1CFN3 Datasheet - Page 122

• Manufacturer Part Number: MC68HC11E1CFN3
• Description: IC MCU 3MHZ 512 EEPROM 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC11E1CFN3

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 3MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 38
• Program Memory Type: ROMless
• Eeprom Size: 512 x 8
• Ram Size: 512 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: 52-PLCC
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 3 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 16 bit
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Program Memory Size: -
• Lead Free Status / Rohs Status: Details

Serial Communications Interface (SCI)
7.7 SCI Registers
7.7.1 Serial Communications Data Register
Data Sheet
122
Five addressable registers are associated with the SCI:
The SCI registers are the same for all M68HC11 E-series devices with one
exception. The SCI system for MC68HC(7)11E20 contains an extra bit in the
BAUD register that provides a greater selection of baud prescaler rates. Refer to
7.7.5 Baud Rate
SCDR is a parallel register that performs two functions:
Reads access the receive data buffer and writes access the transmit data buffer.
Receive and transmit are double buffered.
•
•
•
•
Address:
Reset:
Read:
Write:
Four control and status registers:
–
–
–
–
One data register:
–
The receive data register when it is read
The transmit data register when it is written
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 7-3. Serial Communications Data Register (SCDR)
Serial communications control register 1 (SCCR1)
Serial communications control register 2 (SCCR2)
Baud rate register (BAUD)
Serial communications status register (SCSR)
Serial communications data register (SCDR)
$102F
R7/T7
Bit 7
Serial Communications Interface (SCI)
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Register,
R6/T6
6
Figure
R5/T5
5
7-8, and
Indeterminate after reset
R4/T4
4
Figure
R3/T3
3
7-9.
R2/T2
M68HC11E Family — Rev. 5
2
R1/T1
1
MOTOROLA
R0/T0
Bit 0