参数资料
型号: PIC16F872-E/SS
厂商: Microchip Technology
文件页数: 43/167页
文件大小: 0K
描述: IC MCU CMOS 20MHZ 2K FLSH 28SSOP
产品培训模块: Asynchronous Stimulus
标准包装: 47
系列: PIC® 16F
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
连通性: I²C,SPI
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 22
程序存储器容量: 3.5KB(2K x 14)
程序存储器类型: 闪存
EEPROM 大小: 64 x 8
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 5.5 V
数据转换器: A/D 5x10b
振荡器型: 外部
工作温度: -40°C ~ 125°C
封装/外壳: 28-SSOP(0.209",5.30mm 宽)
包装: 管件
138
8048C–AVR–02/12
ATtiny43U
To read the Fuse High Byte (FHB), simply replace the address in the Z-pointer with 0x0003 and
repeat the procedure above. If successful, the contents of the destination register are as follows.
Refer to Table 19-4 on page 142 for detailed description and mapping of the Fuse High Byte.
To read the Fuse Extended Byte (FEB), replace the address in the Z-pointer with 0x0002 and
repeat the previous procedure. If successful, the contents of the destination register are as
follows.
Refer to Table 19-3 on page 142 for detailed description and mapping of the Fuse Extended
Byte.
18.6.3
Reading Device Signature Imprint Table from Firmware
To read the contents of the device signature imprint table, follow the below procedure:
1.
Load the Z-pointer with the table index.
2.
Set RSIG and SPMEN bits in SPMCSR.
3.
Issue an LPM instruction within three clock cycles.
4.
Read table data from the LPM destination register.
See program example below.
Note:
If successful, the contents of the destination register are as described in section “Device Signa-
Bit
7
6
543
2
1
0
Rd
FHB7
FHB6
FHB5
FHB4
FHB3
FHB2
FHB1
FHB0
Bit
7
6
543
2
1
0
Rd
FEB7
FEB6
FEB5
FEB4
FEB3
FEB2
FEB1
FEB0
Assembly Code Example
DSIT_read:
; Uses Z-pointer as table index
ldi
ZH, 0
ldi
ZL, 1
; Preload SPMCSR bits into R16, then write to SPMCSR
ldi
r16, (1<<RSIG)|(1<<SPMEN)
out
SPMCSR, r16
; Issue LPM. Table data will be returned into r17
lpm
r17, Z
ret
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