MC68HC711E20CFN2

Manufacturer Part NumberMC68HC711E20CFN2
DescriptionIC MCU 20K 2MHZ OTP 52-PLCC
ManufacturerFreescale Semiconductor
SeriesHC11
MC68HC711E20CFN2 datasheets
 


Specifications of MC68HC711E20CFN2

Core ProcessorHC11Core Size8-Bit
Speed2MHzConnectivitySCI, SPI
PeripheralsPOR, WDTNumber Of I /o38
Program Memory Size20KB (20K x 8)Program Memory TypeOTP
Eeprom Size512 x 8Ram Size768 x 8
Voltage - Supply (vcc/vdd)4.5 V ~ 5.5 VData ConvertersA/D 8x8b
Oscillator TypeInternalOperating Temperature-40°C ~ 85°C
Package / Case52-PLCCLead Free Status / RoHS StatusContains lead / RoHS non-compliant
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Page 116/242

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Serial Communications Interface (SCI)
EXTAL
OSCILLATOR
CLOCK GENERATOR
XTAL
*SCP2 is present only on MC68HC(7)11E20.
Figure 7-9. MC68HC(7)11E20 SCI Baud Rate
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
INTERNAL BUS CLOCK (PH2)
AND
(÷4)
÷
3
E
0:0:0
0:0:1
AS
SCR[2:0]
0:0:0
÷
0:0:1
2
÷
0:1:0
2
÷
0:1:1
2
÷
1:0:0
2
÷
1:0:1
2
÷
1:1:0
2
÷
1:1:1
2
Generator Block Diagram
M68HC11E Family Data Sheet, Rev. 5.1
÷
÷
÷
4
13
39
SCP[2:0]*
0:1:0
0:1:1
1:0:0
÷
16
SCI
TRANSMIT
BAUD RATE
(1X)
SCI
RECEIVE
BAUD RATE
(16X)
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