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參數(shù)資料
| 型號： | 12CE673 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 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 |
| 中文描述： | 8引腳，8位CMOS微控制器與A / D轉(zhuǎn)換器和EEPROM數(shù)據(jù)存儲器 |
| 文件頁數(shù)： | 59/116頁 |
| 文件大?。?/td> | 671K |
| 代理商： | 12CE673 |
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1998 Microchip Technology Inc.
Preliminary
DS40181B-page 59
PIC12CE67X
FIGURE 9-18: WAKE-UP FROM SLEEP THROUGH INTERRUPT
Q1
Q2
Q3 Q4
Q1 Q2
Q3
Q4
Q1
Q1
Q2 Q3 Q4
Q1 Q2 Q3 Q4
Q1
Q2 Q3
Q4
Q1 Q2
Q3
Q4
OSC1
CLKOUT(4)
GPIO pin
GPIF flag
(INTCON<0>)
GIE bit
(INTCON<7>)
INSTRUCTION FLOW
PC
Instruction
fetched
Instruction
executed
PC
PC+1
PC+2
Inst(PC) = SLEEP
Inst(PC - 1)
Inst(PC + 1)
SLEEP
Processor in
SLEEP
Interrupt Latency
(Note 2)
Inst(PC + 2)
Inst(PC + 1)
Inst(0004h)
Inst(0005h)
Inst(0004h)
Dummy cycle
PC + 2
0004h
0005h
Dummy cycle
T
OST
(2)
PC+2
Note
1:
2:
3:
4:
XT, HS or LP oscillator mode assumed.
T
OST
= 1024T
OSC
(drawing not to scale) This delay will not be there for INTRC and EXTRC osc mode.
GIE = '1' assumed. In this case after wake- up, the processor jumps to the interrupt routine. If GIE = '0', execution will continue in-line.
CLKOUT is not available in XT, HS or LP osc modes, but shown here for timing reference.
9.9
If the code protection bit(s) have not been pro-
grammed, the on-chip program memory can be read
out for verification purposes.
Program Verification/Code Protection
9.10
Four memory locations (2000h - 2003h) are designated
as ID locations where the user can store checksum or
other code-identification numbers. These locations are
not accessible during normal execution but are read-
able and writable during program/verify. It is recom-
mended that only the 4 least significant bits of the ID
location are used.
ID Locations
9.11
PIC12CE67X microcontrollers can be serially pro-
grammed while in the end application circuit. This is
simply done with two lines for clock and data, and three
other lines for power, ground, and the programming
voltage. This allows customers to manufacture boards
with unprogrammed devices, and then program the
microcontroller just before shipping the product. This
also allows the most recent firmware or a custom firm-
ware to be programmed.
The device is placed into a program/verify mode by
holding the GP1 and GP0 pins low while raising the
MCLR (V
PP
) pin from V
IL
to V
IHH
(see programming
specification). GP1 (clock) becomes the programming
clock and GP0 (data) becomes the programming data.
Both GP0 and GP1 are Schmitt Trigger inputs in this
mode.
In-Circuit Serial Programming
Note:
Microchip does not recommend code pro-
tecting windowed devices.
After reset, to place the device into programming/verify
mode, the program counter (PC) is at location 00h. A 6-
bit command is then supplied to the device. Depending
on the command, 14-bits of program data are then sup-
plied to or from the device, depending if the command
was a load or a read. For complete details of serial pro-
gramming, please refer to the PIC12CE67X Program-
ming Specifications.
FIGURE 9-19: TYPICAL IN-CIRCUIT SERIAL
PROGRAMMING
CONNECTION
External
Connector
Signals
To Normal
Connections
To Normal
Connections
PIC12CE67X
V
DD
V
SS
MCLR/V
PP
GP1
GP0
+5V
0V
V
PP
CLK
Data I/O
V
DD
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