MC9S08QG4MPAE Freescale Semiconductor, MC9S08QG4MPAE Datasheet - Page 249

• Manufacturer Part Number: MC9S08QG4MPAE
• Description: IC MCU 4K FLASH 8-PDIP
• Manufacturer: Freescale Semiconductor
• Series: HCS08r

Specifications of MC9S08QG4MPAE

• Core Processor: HCS08
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 4
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Controller Family/series: HCS08
• No. Of I/o's: 6
• Ram Memory Size: 256Byte
• Cpu Speed: 20MHz
• No. Of Timers: 2
• Embedded Interface Type: I2C, SCI, SPI
• Rohs Compliant: Yes
• Processor Series: S08QG
• Core: HCS08
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: I2C, SCI, SPI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 1
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: EWS08
• Development Tools By Supplier: DEMO9S08QG8E
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Figure 17-3
asynchronous to the target MCU, there is a 0-to-1 cycle delay from the host-generated falling edge on
BKGD to the perceived start of the bit time in the target MCU. The host holds the BKGD pin low long
enough for the target to recognize it (at least two target BDC cycles). The host must release the low drive
before the target MCU drives a brief active-high speedup pulse seven cycles after the perceived start of the
bit time. The host should sample the bit level about 10 cycles after it started the bit time.
Freescale Semiconductor
SYNCHRONIZATION
PERCEIVED START
PERCEIVED START
(TARGET MCU)
SPEEDUP PULSE
(TARGET MCU)
TO BKGD PIN
BDC CLOCK
HOST DRIVE
TARGET MCU
UNCERTAINTY
TRANSMIT 1
TRANSMIT 0
BDC CLOCK
OF BIT TIME
OF BIT TIME
BKGD PIN
HOST
HOST
shows the host receiving a logic 1 from the target HCS08 MCU. Because the host is
Figure 17-3. BDC Target-to-Host Serial Bit Timing (Logic 1)
Figure 17-2. BDC Host-to-Target Serial Bit Timing
HIGH-IMPEDANCE
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 5
R-C RISE
10 CYCLES
HOST SAMPLES BKGD PIN
TARGET SENSES BIT LEVEL
10 CYCLES
10 CYCLES
HIGH-IMPEDANCE
HIGH-IMPEDANCE
EARLIEST START
EARLIEST START
OF NEXT BIT
OF NEXT BIT
Development Support
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