MC68HC711E20CFN4 Freescale Semiconductor, MC68HC711E20CFN4 Datasheet - Page 113
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MC68HC711E20CFN4
Manufacturer Part Number
MC68HC711E20CFN4
Description
IC MCU 20K OTP 4MHZ 52-PLCC
Manufacturer
Freescale Semiconductor
Series
HC11r
Specifications of MC68HC711E20CFN4
Core Processor
HC11
Core Size
8-Bit
Speed
4MHz
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
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68HC711E20CFN4
Manufacturer:
FREESCALE
Quantity:
2 100
Company:
Part Number:
MC68HC711E20CFN4
Manufacturer:
Freescale Semiconductor
Quantity:
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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
113
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