MC68HC705B16CFN

Manufacturer Part NumberMC68HC705B16CFN
DescriptionIC MCU 2.1MHZ 15K OTP 52-PLCC
ManufacturerFreescale Semiconductor
SeriesHC05
MC68HC705B16CFN datasheet
 


Specifications of MC68HC705B16CFN

Core ProcessorHC05Core Size8-Bit
Speed2.1MHzConnectivitySCI
PeripheralsPOR, WDTNumber Of I /o32
Program Memory Size15KB (15K x 8)Program Memory TypeOTP
Eeprom Size256 x 8Ram Size352 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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16X internal sampling clock
RT clock edges for all three examples
Idle
RDI
1
1
1
1
1
1
RDI
1
1
1
1
1
1
Noise
RDI
1
1
1
1
1
0
Figure 6-4 SCI examples of start bit sampling technique
Previous bit
Present bit
RDI
16RT 1RT
Figure 6-5 SCI sampling technique used on all bits
If there has been a framing error without detection of a break (10 zeros for 8 bit format or 11 zeros
for 9 bit format), the circuit continues to operate as if there actually was a stop bit, and the start
edge will be placed artificially. The last bit received in the data shift register is inverted to a logic
one, and the three logic one start qualifiers (shown in
register during the interval when detection of a start bit is anticipated (see
the start bit will be accepted no sooner than it is anticipated.
MC68HC05B6
SERIAL COMMUNICATIONS INTERFACE
Rev. 4.1
1RT 2RT 3RT
4RT
5RT
Start
1
1
1
1
1
0
0
0
Start
Start edge
qualifiers
verification samples
Start
Noise
1
1
1
1
1
0
0
1
Start
1
1
1
1
1
0
0
0
Samples
8RT 9RT 10RT
16RT 1RT
Figure
6-4) are forced into the sample shift
6RT
7RT
8RT
0
0
6
0
Next bit
Figure
6-6); therefore,
Freescale
6-7