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HCS08 bảng dữ liệu(PDF) 164 Page - NXP Semiconductors

tên linh kiện HCS08
Giải thích chi tiết về linh kiện  HCS08 Microcontrollers
PDF  198 Pages
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HCS08 bảng dữ liệu(HTML) 164 Page - NXP Semiconductors

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Development Support
MC9S08QD4 Series MCU Data Sheet, Rev. 6
164
Freescale Semiconductor
Figure 12-4. BDM Target-to-Host Serial Bit Timing (Logic 0)
12.2.3
BDC Commands
BDC commands are sent serially from a host computer to the BKGD pin of the target HCS08 MCU. All
commands and data are sent MSB-first using a custom BDC communications protocol. Active background
mode commands require that the target MCU is currently in the active background mode while
non-intrusive commands may be issued at any time whether the target MCU is in active background mode
or running a user application program.
Table 12-1 shows all HCS08 BDC commands, a shorthand description of their coding structure, and the
meaning of each command.
Coding Structure Nomenclature
This nomenclature is used in Table 12-1 to describe the coding structure of the BDC commands.
10 CYCLES
BDC CLOCK
(TARGET MCU)
HOST DRIVE
TO BKGD PIN
TARGET MCU
DRIVE AND
PERCEIVED START
OF BIT TIME
HIGH-IMPEDANCE
BKGD PIN
10 CYCLES
SPEED-UP PULSE
SPEEDUP
PULSE
EARLIEST START
OF NEXT BIT
HOST SAMPLES BKGD PIN



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