參數(shù)資料
型號(hào): PIC16C64A-20I/L
廠商: Microchip Technology
文件頁(yè)數(shù): 120/126頁(yè)
文件大?。?/td> 0K
描述: IC MCU OTP 2KX14 PWM 44PLCC
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝: 27
系列: PIC® 16C
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
連通性: I²C,SPI
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 33
程序存儲(chǔ)器容量: 3.5KB(2K x 14)
程序存儲(chǔ)器類型: OTP
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 6 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
配用: AC164309-ND - MODULE SKT FOR PM3 44PLCC
444-1001-ND - DEMO BOARD FOR PICMICRO MCU
309-1040-ND - ADAPTER 44-PLCC ZIF TO 40-DIP
309-1039-ND - ADAPTER 44-PLCC TO 40-DIP
其它名稱: PIC16C64A-20I/LR
PIC16C64A-20I/LR-ND
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93
AT90S/LS4433
1042H–AVR–04/03
Serial Downloading
Both the Program and Data memory arrays can be programmed using the SPI bus while
RESET is pulled to GND. The serial interface consists of pins SCK, MOSI (input) and
MISO (output) (see Figure 66). After RESET is set low, the Programming Enable
instruction needs to be executed first before program/erase instructions can be
executed.
Figure 66. Serial Programming and Verify
For the EEPROM, an auto-erase cycle is provided within the self-timed write instruction
and there is no need to first execute the Chip Erase instruction. The Chip Erase instruc-
tion turns the content of every memory location in both the program and EEPROM
arrays into $FF.
The Program and EEPROM memory arrays have separate address spaces: 0000 to
$07FF for Program memory and $0000 to $00FF for EEPROM memory.
Either an external system clock is supplied at pin XTAL1 or a crystal needs to be con-
nected across pins XTAL1 and XTAL2. The minimum low and high periods for the serial
clock (SCK) input are defined as follows:
Low: > 2 XTAL1 clock cycles
High: > 2 XTAL1 clock cycles
Serial Programming
Algorithm
When writing serial data to the AT90S4433, data is clocked on the rising edge of CLK.
When reading data from the AT90S4433, data is clocked on the falling edge of CLK.
See Figure 67, Figure 68 and Table 36 for details.
To program and verify the AT90S4433 in the Serial Programming mode, the following
sequence is recommended (see 4-byte instruction formats in Table 35
):
1.
Power-up sequence:
Apply power between V
CC and GND while RESET and SCK are set to “0”. If a
crystal is not connected across pins XTAL1 and XTAL2, apply a clock signal to
the XTAL1 pin. In some systems, the programmer cannot guarantee that SCK is
held low during Power-up. In this case, RESET must be given a positive pulse of
at least two XTAL1 cycles’ duration after SCK has been set to “0”.
2.
Wait for at least 20 ms and enable serial programming by sending the Program-
ming Enable serial instruction to pin MOSI/PB3.
3.
The serial programming instructions will not work if the communication is out of
synchronization. When in sync, the second byte ($53) will echo back when issu-
AT90S/LS4433
VCC
4.0 - 6.0 V (AT90S4433)
2.7 - 6.0 V (AT90LS4433)
PB5(SCK)
PB4(MISO)
PB3(MOSI)
RESET
GND
XTAL1
CLOCK IN
GND
DATA OUT
INSTR. IN
CLOCK
INPUT
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