MC9S08AC48MFDE Freescale Semiconductor, MC9S08AC48MFDE Datasheet - Page 287
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MC9S08AC48MFDE
Manufacturer Part Number
MC9S08AC48MFDE
Description
MCU 8BIT 48K FLASH 48-QFN
Manufacturer
Freescale Semiconductor
Series
HCS08r
Datasheet
1.MC9S08AC60CFJE.pdf
(348 pages)
Specifications of MC9S08AC48MFDE
Core Processor
HCS08
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
38
Program Memory Size
48KB (48K x 8)
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
48-QFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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Figure 16-4
asynchronous to the target MCU, there is a 0-to-1 cycle delay from the host-generated falling edge on
BKGD to the start of the bit time as perceived by the target MCU. The host initiates the bit time but the
target HCS08 finishes it. Because the target wants the host to receive a logic 0, it drives the BKGD pin low
for 13 BDC clock cycles, then briefly drives it high to speed up the rising edge. The host samples the bit
level about 10 cycles after starting the bit time.
Freescale Semiconductor
SPEED-UP PULSE
PERCEIVED START
TO BKGD PIN
TARGET MCU
(TARGET MCU)
HOST DRIVE
DRIVE AND
BDC CLOCK
OF BIT TIME
BKGD PIN
shows the host receiving a logic 0 from the target HCS08 MCU. Because the host is
Figure 16-4. BDM Target-to-Host Serial Bit Timing (Logic 0)
MC9S08AC60 Series Data Sheet, Rev. 2
10 CYCLES
HOST SAMPLES BKGD PIN
10 CYCLES
HIGH-IMPEDANCE
SPEEDUP
PULSE
Chapter 16 Development Support
EARLIEST START
OF NEXT BIT
287
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