參數(shù)資料
型號: PIC16CE625T-30/SS
廠商: Microchip Technology
文件頁數(shù): 73/100頁
文件大小: 0K
描述: IC MCU OTP 2KX14 EE COMP 20SSOP
標準包裝: 1,600
系列: PIC® 16C
核心處理器: PIC
芯體尺寸: 8-位
速度: 30MHz
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,WDT
輸入/輸出數(shù): 13
程序存儲器容量: 3.5KB(2K x 14)
程序存儲器類型: OTP
EEPROM 大?。?/td> 128 x 8
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 20-SSOP(0.209",5.30mm 寬)
包裝: 帶卷 (TR)
其它名稱: PIC16CE625T30/SS
PIC16CE62X
DS40182C-page 64
1999 Microchip Technology Inc.
10.9
Code Protection
If
the
code
protection
bit(s)
have
not
been
programmed, the on-chip program memory can be
read out for verification purposes.
10.10
ID Locations
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
readable and writable during program/verify. Only the
least significant 4 bits of the ID locations are used.
Note:
Microchip does not recommend code
protecting windowed devices.
10.11
In-Circuit Serial Programming
The PIC16CE62X microcontrollers can be serially
programmed 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
firmware to be programmed.
The device is placed into a program/verify mode by
holding the RB6 and RB7 pins low, while raising the
MCLR (VPP) pin from VIL to VIHH (see programming
specification). RB6 becomes the programming clock
and RB7 becomes the programming data. Both RB6
and RB7 are Schmitt Trigger inputs in this mode.
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 supplied to or from the device, depending if the
command was a load or a read. For complete details of
serial
programming,
please
refer
to
the
PIC16C6X/7X/9XX Programming Specifications (Liter-
ature #DS30228).
A typical in-circuit serial programming connection is
shown in Figure 10-20.
FIGURE 10-20: TYPICAL IN-CIRCUIT SERIAL
PROGRAMMING
CONNECTION
External
Connector
Signals
To Normal
Connections
To Normal
Connections
PIC16CE62X
VDD
VSS
MCLR/VPP
RB6
RB7
+5V
0V
VPP
CLK
Data I/O
VDD
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