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參數(shù)資料
| 型號： | 12C672 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Test Prod Wire; Conductor Size AWG:18; No. Strands x Strand Size:65 x 36; Jacket Color:Black; Conductor Material:Copper; Jacket Material:Rubber; Leaded Process Compatible:Yes; Number of Conductors:1; Outer Diameter:0.144" RoHS Compliant: Yes |
| 中文描述： | EPROM存儲器編程規(guī)范 |
| 文件頁數(shù)： | 7/14頁 |
| 文件大?。?/td> | 175K |
| 代理商： | 12C672 |
1998 Microchip Technology Inc.
DS40175A-page 7
EPROM Memory Programming Specification
1.0.1.2
LOAD DATA
After receiving this command, the chip will load in a
14-bit “data word” when 16 cycles are applied, as
described previously. A timing diagram for the load data
command is shown in Figure 4-1.
1.0.1.3
READ DATA
After receiving this command, the chip will transmit
data bits out of the memory currently accessed starting
with the second rising edge of the clock input. The GP0
pin will go into output mode on the second rising clock
edge, and it will revert back to input mode (hi-imped-
ance) after the 16th rising edge. A timing diagram of
this command is shown in Figure 4-2.
1.0.1.4
INCREMENT ADDRESS
The PC is incremented when this command is
received. A timing diagram of this command is shown
in Figure 4-3.
1.0.1.5
BEGIN PROGRAMMING
A load command (load configuration or load data)
must be given before every begin programming
command.
Programming of the appropriate memory
(test program memory or user program memory) will
begin after this command is received and decoded.
Programming should be performed with a series of
100
μ
s programming pulses. A programming pulse is
defined as the time between the begin programming
command and the end programming command.
1.0.1.6
END PROGRAMMING
After receiving this command, the chip stops program-
ming the memory (configuration program memory or
user program memory) that it was programming at the
time.
1.1
Programming Algorithm Requires
Variable V
DD
The PIC12C67X and PIC12CE67X uses an intelligent
algorithm. The algorithm calls for program verification
at V
DD
min as well as V
DD
max. Verification at V
guarantees good “erase margin”. Verification at
V
DD
max guarantees good “program margin”.
The actual programming must be done with V
V
DDP
range (4.75 - 5.25V).
V
DDP
= V
CC
range required during programming.
V
DD
min. = minimum operating V
V
DD
max.= maximum operating V
Programmers must verify the PIC12C67X and
PIC12CE67X at its specified V
els. Since Microchip may introduce future versions of
the PIC12C67X and PIC12CE67X with a broader V
DD
range, it is best that these levels are user selectable
(defaults are ok).
DD
min
DD
in the
DD
spec for the part.
spec for the part.
DD
DD
max and V
DD
min lev-
Note:
Any programmer not meeting these
requirements may only be classified as
“prototype” or “development” programmer
but not a “production” quality programmer.
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| 12CE673 | HookUp/Lead Wire; Conductor Size AWG:18; No. Strands x Strand Size:65 x 36; Jacket Color:Black; Conductor Material:Copper; Jacket Material:Rubber; Leaded Process Compatible:Yes; Number of Conductors:1; Outer Diameter:0.144" RoHS Compliant: Yes |
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