MC68HC11E1CFNE2R Freescale Semiconductor, MC68HC11E1CFNE2R Datasheet - Page 116

• Manufacturer Part Number: MC68HC11E1CFNE2R
• Description: IC MCU 8BIT 2MHZ 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC11E1CFNE2R

• 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: 2MHz
• No. Of Timers: 1
• Embedded Interface Type: SCI, SPI
• Rohs Compliant: Yes
• Processor Series: HC11E
• Core: HC11
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 2 MHz
• Number Of Programmable I/os: 38
• Number Of Timers: 8
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 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

Serial Communications Interface (SCI)
7.8 Status Flags and Interrupts
The SCI transmitter has two status flags. These status flags can be read by software (polled) to tell when
the corresponding condition exists. Alternatively, a local interrupt enable bit can be set to enable each of
these status conditions to generate interrupt requests when the corresponding condition is present.
Status flags are automatically set by hardware logic conditions, but must be cleared by software, which
provides an interlock mechanism that enables logic to know when software has noticed the status
indication. The software clearing sequence for these flags is automatic. Functions that are normally
performed in response to the status flags also satisfy the conditions of the clearing sequence.
116
*SCP2 is present only on MC68HC(7)11E20.
XTAL
EXTAL
CLOCK GENERATOR
OSCILLATOR
Figure 7-9. MC68HC(7)11E20 SCI Baud Rate
AND
(÷4)
M68HC11E Family Data Sheet, Rev. 5.1
Generator Block Diagram
AS
E
÷
÷
÷
÷
÷
÷
÷
2
2
2
2
2
2
2
0:0:0
SCR[2:0]
÷
0:0:0
0:0:1
0:1:0
0:1:1
1:0:0
1:0:1
1:1:0
1:1:1
3
0:0:1
INTERNAL BUS CLOCK (PH2)
÷
4
0:1:0
÷
BAUD RATE
BAUD RATE
TRANSMIT
RECEIVE
13
(16X)
÷
(1X)
SCI
SCI
0:1:1
16
÷
39
Freescale Semiconductor
SCP[2:0]*
1:0:0