MC68HC11E1CFNE3 Freescale Semiconductor, MC68HC11E1CFNE3 Datasheet - Page 113

• Manufacturer Part Number: MC68HC11E1CFNE3
• Description: IC MCU 8BIT 3MHZ 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC11E1CFNE3

• 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
• Controller Family/series: 68HC11
• No. Of I/o's: 38
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 512Byte
• Cpu Speed: 3MHz
• No. Of Timers: 1
• Embedded Interface Type: SCI, SPI
• Rohs Compliant: Yes
• Processor Series: HC11E
• Core: HC11
• Data Bus Width: 8 bit
• Program Memory Size: 512 B
• Data Ram Size: 512 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 3 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 8
• Operating Supply Voltage: 3 V to 5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• On-chip Adc: 8 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Program Memory Size: -
• Lead Free Status / Rohs Status: Details

FE — Framing Error Flag
Bit 0 — Unimplemented
7.7.5 Baud Rate Register
Use this register to select different baud rates for the SCI system. The SCP[1:0] (SCP[2:0] in
MC68HC(7)11E20) bits function as a prescaler for the SCR[2:0] bits. Together, these five bits provide
multiple baud rate combinations for a given crystal frequency. Normally, this register is written once during
initialization. The prescaler is set to its fastest rate by default out of reset and can be changed at any time.
Refer to
TCLR — Clear Baud Rate Counter Bit (Test)
SCP[2:0] — SCI Baud Rate Prescaler Select Bits
RCKB — SCI Baud Rate Clock Check Bit (Test)
Freescale Semiconductor
FE is set when a 0 is detected where a stop bit was expected. Clear the FE flag by reading SCSR with
FE set and then reading SCDR.
Always reads 0
See
0 = Stop bit detected
1 = Zero detected
Table
Table 7-1
7-1.
Address:
SCP2 applies to MC68HC(7)11E20 only. When SCP2 = 1, SCP[1:0] must
equal 0s. Any other values for SCP[1:0] are not decoded in the prescaler
and the results are unpredictable. Refer to
Reset:
Read:
Write:
for normal baud rate selections.
U = Unaffected
$102B
TCLR
Bit 7
0
Figure 7-7. Baud Rate Register (BAUD)
SCP2
6
0
M68HC11E Family Data Sheet, Rev. 5.1
SCP1
5
0
NOTE
SCP0
4
0
Figure 7-8
RCKB
3
0
SCR2
and
U
2
Figure
SCR1
U
1
7-9.
SCR0
Bit 0
U
SCI Registers
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