MC908GR4CDWE Freescale Semiconductor, MC908GR4CDWE Datasheet - Page 246

IC MCU 4K FLASH 8MHZ 28-SOIC

MC908GR4CDWE

Manufacturer Part Number
MC908GR4CDWE
Description
IC MCU 4K FLASH 8MHZ 28-SOIC
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheets

Specifications of MC908GR4CDWE

Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
17
Program Memory Size
4KB (4K x 8)
Program Memory Type
FLASH
Ram Size
384 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 6x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SOIC (7.5mm Width)
Controller Family/series
HC08
No. Of I/o's
21
Ram Memory Size
384Byte
Cpu Speed
8MHz
No. Of Timers
1
Embedded Interface Type
I2C, SCI, SPI
Rohs Compliant
Yes
Processor Series
HC08GR
Core
HC08
Data Bus Width
8 bit
Data Ram Size
384 B
Interface Type
SCI, SPI
Maximum Clock Frequency
8.2 MHz
Number Of Programmable I/os
21
Number Of Timers
3
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Development Tools By Supplier
FSICEBASE, DEMO908GZ60E, M68CBL05CE, M68EML08GPGTE
Minimum Operating Temperature
- 40 C
On-chip Adc
8 bit, 6 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
 Details
Serial Communications Interface (SCI)
18.5.3.6 Slow Data Tolerance
Technical Data
246
tolerance is much more than the degree of misalignment that is likely to
occur.
As the receiver samples an incoming character, it resynchronizes the RT
clock on any valid falling edge within the character. Resynchronization
within characters corrects misalignments between transmitter bit times
and receiver bit times.
Figure 18-7
misaligned without causing a noise error or a framing error. The slow
stop bit begins at RT8 instead of RT1 but arrives in time for the stop bit
data samples at RT8, RT9, and RT10.
For an 8-bit character, data sampling of the stop bit takes the receiver
9 bit times
With the misaligned character shown in
154 RT cycles at the point when the count of the transmitting device is
9 bit times
The maximum percent difference between the receiver count and the
transmitter count of a slow 8-bit character with no errors is
For a 9-bit character, data sampling of the stop bit takes the receiver
10 bit times
RECEIVER
RT CLOCK
Freescale Semiconductor, Inc.
For More Information On This Product,
Serial Communications Interface (SCI)
shows how much a slow received character can be
Go to: www.freescale.com
16 RT cycles + 10 RT cycles = 154 RT cycles.
16 RT cycles + 3 RT cycles = 147 RT cycles.
16 RT cycles + 10 RT cycles = 170 RT cycles.
MSB
154 147
------------------------- -
Figure 18-7. Slow Data
154
100
SAMPLES
DATA
Figure
=
4.54%
18-7, the receiver counts
MC68HC908GR8 — Rev 4.0
STOP
MOTOROLA

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