參數(shù)資料
型號: PIC18F25K20T-I/SS
廠商: Microchip Technology
文件頁數(shù): 17/42頁
文件大小: 0K
描述: IC PIC MCU FLASH 16KX16 28SSOP
產(chǎn)品培訓(xùn)模塊: PIC18 K-Series
XLP Deep Sleep Mode
8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝: 1
系列: PIC® XLP™ 18F
核心處理器: PIC
芯體尺寸: 8-位
速度: 64MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,HLVD,POR,PWM,WDT
輸入/輸出數(shù): 24
程序存儲器容量: 32KB(16K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量: 1.5K x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 11x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 28-SSOP(0.209",5.30mm 寬)
包裝: 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁面: 656 (CN2011-ZH PDF)
配用: AC164112-ND - VOLTAGE LIMITER MPLAB ICD2 VPP
AC164307-ND - MODULE SKT FOR PM3 28SSOP
其它名稱: PIC18F25K20T-I/SSDKR
PIC18F2XK20/4XK20
DS41297F-page 24
Advance Information
2009 Microchip Technology Inc.
4.0
READING THE DEVICE
4.1
Read Code Memory, ID Locations
and Configuration Bits
Code memory is accessed one byte at a time via the
4-bit command, ‘1001’ (table read, post-increment).
The contents of memory pointed to by the Table Pointer
(TBLPTRU:TBLPTRH:TBLPTRL) are serially output on
PGD.
The 4-bit command is shifted in LSb first. The read is
executed during the next 8 clocks, then shifted out on
PGD during the last 8 clocks, LSb to MSb. A delay of
P6 must be introduced after the falling edge of the 8th
PGC of the operand to allow PGD to transition from an
input to an output. During this time, PGC must be held
low (see Figure 4-1). This operation also increments
the Table Pointer by one, pointing to the next byte in
code memory for the next read.
This technique will work to read any memory in the
000000h to 3FFFFFh address space, so it also applies
to the reading of the ID and Configuration registers.
TABLE 4-1:
READ CODE MEMORY SEQUENCE
FIGURE 4-1:
TABLE READ POST-INCREMENT INSTRUCTION TIMING DIAGRAM (1001)
Note:
When table read protection is enabled, the
first read access to a protected block
should be discarded and the read repeated
to retrieve valid data. Subsequent reads of
the same block can be performed normally.
4-bit
Command
Data Payload
Core Instruction
Step 1: Set Table Pointer
0000
0E <Addr[21:16]>
6E F8
0E <Addr[15:8]>
6E F7
0E <Addr[7:0]>
6E F6
MOVLW Addr[21:16]
MOVWF TBLPTRU
MOVLW <Addr[15:8]>
MOVWF TBLPTRH
MOVLW <Addr[7:0]>
MOVWF TBLPTRL
Step 2: Read memory and then shift out on PGD, LSb to MSb
1001
00 00
TBLRD *+
12
3
4
PGC
P5
PGD
PGD = Input
Shift Data Out
P6
PGD = Output
56
7
8
12
3
4
P5A
9
10
11
13
15
16
14
12
Fetch Next 4-bit Command
10
0
1
PGD = Input
LSb
MSb
12
34
56
12
3
4
nn
P14
Note
1:
Magnification of the high-impedance delay between PGC and PGD is shown in Figure 4-6.
(Note 1)
相關(guān)PDF資料
PDF描述
PIC16LF726-I/SP IC PIC MCU FLASH 8K 1.8V 28-DIP
PIC16F1824-I/ML IC PIC MCU 8BIT 14KB FLSH 16QFN
PIC16F677-I/SS IC PIC MCU FLASH 2KX14 20SSOP
PIC16F677-I/P IC PIC MCU FLASH 2KX14 20DIP
PIC17LC44T-08/L IC MCU OTP 8KX16 PWM 44PLCC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC18F25K22-E/ML 功能描述:8位微控制器 -MCU 32KB Flash 1536B RAM 8B nanoWatt RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC18F25K22-E/SO 功能描述:8位微控制器 -MCU 32KB Flash 1536B RAM 8B nanoWatt RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC18F25K22-E/SP 功能描述:8位微控制器 -MCU 32KB Flash 1536B RAM 8b FamilynanoWatt RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC18F25K22-E/SS 功能描述:8位微控制器 -MCU 32KB Flash 1536B RAM 8B nanoWatt RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC18F25K22-I/ML 功能描述:8位微控制器 -MCU 32KB Flash 1536B RAM 8B nanoWatt RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT