MC68HC711E20CFN2 Freescale Semiconductor, MC68HC711E20CFN2 Datasheet - Page 160

• Manufacturer Part Number: MC68HC711E20CFN2
• Description: IC MCU 20K 2MHZ OTP 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711E20CFN2

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 2MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 38
• Program Memory Size: 20KB (20K x 8)
• Program Memory Type: OTP
• Eeprom Size: 512 x 8
• Ram Size: 768 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

Serial Communications Interface (SCI)
7.9 Status Flags and Interrupts
Technical Data
160
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
XTAL
EXTAL
Serial Communications Interface (SCI)
Figure 7-8. SCI Baud Rate Generator Block Diagram
CLOCK GENERATOR
OSCILLATOR
AND
( 4)
AS
E
2
2
2
2
2
2
2
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
INTERNAL BUS CLOCK (PH2)
0:1
M68HC11E Family — Rev. 3.2
4
1:0
BAUD RATE
BAUD RATE
TRANSMIT
RECEIVE
(16X)
(1X)
SCI
SCI
13
16
MOTOROLA
1:1
SCP[1:0]