MC908GR4CDWE Freescale Semiconductor, MC908GR4CDWE Datasheet - Page 182

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

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)
18.8.5 SCI Status Register 2
SCI status register 2 contains flags to signal the following conditions:
BKF — Break Flag Bit
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This clearable, read-only bit is set when the SCI detects a break character on the PE1/RxD pin. In
SCS1, the FE and SCRF bits are also set. In 9-bit character transmissions, the R8 bit in SCC3 is
cleared. BKF does not generate a CPU interrupt request. Clear BKF by reading SCS2 with BKF set
and then reading the SCDR. Once cleared, BKF can become set again only after 1s again appear on
the PE1/RxD pin followed by another break character. Reset clears the BKF bit.
1 = Break character detected
0 = No break character detected
Break character detected
Incoming data
Address:
Reset:
Read:
Write:
BYTE 1
BYTE 1
$0017
Bit 7
0
0
READ SCS1
READ SCDR
MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7
SCRF = 1
Figure 18-14. SCI Status Register 2 (SCS2)
= Unimplemented
OR = 0
BYTE 1
Figure 18-13. Flag Clearing Sequence
6
0
0
READ SCDR
READ SCS1
BYTE 2
BYTE 2
DELAYED FLAG CLEARING SEQUENCE
SCRF = 1
NORMAL FLAG CLEARING SEQUENCE
BYTE 1
OR = 0
5
0
0
READ SCDR
READ SCS1
SCRF = 1
4
0
0
BYTE 2
OR = 0
3
0
0
BYTE 3
BYTE 3
2
0
0
READ SCDR
READ SCDR
READ SCS1
READ SCS1
SCRF = 1
SCRF = 1
BYTE 3
BYTE 3
OR = 1
OR = 0
BKF
1
0
BYTE 4
BYTE 4
Freescale Semiconductor
Bit 0
RPF
0