MC68HC11E0CFN2 Freescale Semiconductor, MC68HC11E0CFN2 Datasheet - Page 129

• Manufacturer Part Number: MC68HC11E0CFN2
• Description: IC MCU 2MHZ 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC11E0CFN2

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 2MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 38
• Program Memory Type: ROMless
• 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
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -

7.8 Status Flags and Interrupts
M68HC11E Family — Rev. 5
MOTOROLA
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
*SCP2 is present only on MC68HC(7)11E20.
XTAL
EXTAL
Freescale Semiconductor, Inc.
For More Information On This Product,
Serial Communications Interface (SCI)
CLOCK GENERATOR
OSCILLATOR
Go to: www.freescale.com
Figure 7-9. MC68HC(7)11E20 SCI Baud Rate
AND
(÷4)
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
Serial Communications Interface (SCI)
0:0:1
INTERNAL BUS CLOCK (PH2)
÷
4
0:1:0
Status Flags and Interrupts
÷
BAUD RATE
BAUD RATE
TRANSMIT
RECEIVE
13
(16X)
÷
(1X)
SCI
SCI
0:1:1
16
÷
39
Data Sheet
SCP[2:0]*
1:0:0
129