參數(shù)資料
型號: MC68LNC705C9ACFN
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 62/177頁
文件大?。?/td> 1941K
代理商: MC68LNC705C9ACFN
EPROM Programming
Advance Information
MC68HC705C9A — Rev. 4.0
154
EPROM Programming
MOTOROLA
Three pins are used to select various bootloader functions: PD5, PD4,
and PD3. Two other pins, PC6 and PC7, are used to drive the PROG
LED and the VERF LED, respectively. The programming modes are
shown in Table A-2.
A.5 Programming Register (PROG)
This register is used to program the EPROM array. To program a byte of
EPROM, set LATCH, write data to the desired address, and set EPGM
for tEPGM.
LATCH — EPROM Latch Control Bit
This read/write bit controls the latching of the address and data buses
when programming the EPROM.
1 = Address and data buses latched when the following instruction
is a write to 1 of the EPROM locations. Normal reading is
disabled if LATCH = 1.
0 = EPROM address and data bus configured for normal reading
Table A-2. Bootloader Functions
PD5
PD4
PD3
Mode
0
Program/verify
0
1
Verify only
0
1
0
Load RAM and execute
1
X
Secure
$001X
Bit 7
6
5
4321
Bit 0
Read:
LATCH
EPGM
Write:
Reset:
00000000
Figure A-1. EPROM Programming Register
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PDF描述
MC68HC705C9ACS 8-BIT, UVPROM, 2.1 MHz, MICROCONTROLLER
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