參數(shù)資料
型號： MC68C912B32FU8
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 16-Bit Microcontroller
中文描述： 16-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP80
封裝： QFP-80
文件頁數(shù)： 120/128頁
文件大?。?/td> 748K
代理商： MC68C912B32FU8
MOTOROLA
120
MC68HC912B32
MC68HC912B32TS/D
16.2.4 BDM Registers
Seven BDM registers are mapped into the standard 64-Kbyte address space when BDM is active. The
registers can be accessed with the hardware READ_BD and WRITE_BD commands, but must not be
written during BDM operation. Most users will only be interested in the STATUS register at $FF01; other
registers are only for use by BDM firmware and logic.
The instruction register is discussed for two conditions: when a
hardware
command is executed and
when a
firmware
command is executed.
The bits in the BDM instruction register have the following meanings when a
hardware
command is
executed.
H/F — Hardware/Firmware Flag
0 = Firmware instruction
1 = Hardware instruction
DATA — Data Flag
0 = No data
1 = Data included in command
R/W — Read/Write Flag
0 = Write
1 = Read
BKGND — Hardware request to enter active background mode
0 = Not a hardware background command
1 = Hardware background command (INSTRUCTION = $90)
Table 44 BDM Firmware Commands
Command
READ_NEXT
READ_PC
READ_D
READ_X
READ_Y
READ_SP
WRITE_NEXT
WRITE_PC
WRITE_D
WRITE_X
WRITE_Y
WRITE_SP
GO
TRACE1
TAGGO
Opcode (Hex)
62
63
64
65
66
67
42
43
44
45
46
47
08
10
18
Data
Description
16-bit data out
16-bit data out
16-bit data out
16-bit data out
16-bit data out
16-bit data out
16-bit data in
16-bit data in
16-bit data in
16-bit data in
16-bit data in
16-bit data in
None
None
None
X = X + 2; Read next word pointed-to by X
Read program counter
Read D accumulator
Read X index register
Read Y index register
Read stack pointer
X = X + 2; Write next word pointed-to by X
Write program counter
Write D accumulator
Write X index register
Write Y index register
Write stack pointer
Go to user program
Execute one user instruction then return to BDM
Enable tagging and go to user program
INSTRUCTION
— BDM Instruction Register (hardware command bit explanation)
(BDM) $FF00
Bit 7
6
5
4
3
2
1
Bit 0
H/F
DATA
R/W
BKGND
W/B
BD/U
0
0
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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MC68CK16Z1CPV16 功能描述:16位微控制器 - MCU 16 Bit 16MHz RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
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