参数资料
型号: PIC32MX775F256LT-80I/PT
厂商: Microchip Technology
文件页数: 5/64页
文件大小: 0K
描述: IC MCU 32BIT 256K FLASH 100TQFP
标准包装: 1,200
系列: PIC® 32MX
核心处理器: MIPS32? M4K?
芯体尺寸: 32-位
速度: 80MHz
连通性: CAN,以太网,I²C,SPI,UART/USART,USB OTG
外围设备: 欠压检测/复位,DMA,POR,PWM,WDT
输入/输出数: 85
程序存储器容量: 256KB(256K x 8)
程序存储器类型: 闪存
RAM 容量: 64K x 8
电压 - 电源 (Vcc/Vdd): 2.3 V ~ 3.6 V
数据转换器: A/D 16x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 100-TQFP
包装: 带卷 (TR)
2007-2012 Microchip Technology Inc.
DS61145K-page 13
PIC32MX
5.3
2-wire ICSP Details
In ICSP mode, the 2-wire ICSP signals are time
multiplexed into the 2-wire to 4-wire block. The 2-wire
to 4-wire block then converts the signals to look like a
4-wire JTAG port to the TAP controller.
There are two possible modes of operation:
4-phase ICSP
2-phase ICSP
5.3.1
4-PHASE ICSP
In 4-phase ICSP mode, the TDI, TDO and TMS device
pins are multiplexed onto PGEDx in four clocks (see
Figure 5-4). The Least Significant bit (LSb) is shifted
first; and TDI and TMS are sampled on the falling edge
of PGECx, while TDO is driven on the falling edge of
PGECx. The 4-phase ICSP mode is used for both read
and write data transfers.
5.3.2
2-PHASE ICSP
In 2-phase ICSP mode, the TMS and TDI device pins
are multiplexed into PGEDx in two clocks (see
Figure 5-5). The LSb is shifted first; and TDI and TMS
are sampled on the falling edge of PGECx. There is no
TDO output provided in this mode. The 2-phase ICSP
mode was designed to accelerate 2-wire, write-only
transactions.
FIGURE 5-4:
2-WIRE, 4-PHASE
FIGURE 5-5:
2-WIRE, 2-PHASE
Note:
The packet is not actually executed until the
first clock of the next packet. To enter 2-wire,
2-phase ICSP mode, the TDOEN bit
(DDPCON<0>) must be set to ‘0’.
TMS
TDI
TDO
IR4
IR0
‘1’
TCK
‘1’
‘0’
X
1
PGECx
PGEDx
pTDO = 1
TDI = IR0
TMS = 0
nTDO = 0
TMS
TDI
TDO
IR4
IR0
‘1’
TCK
‘1’
‘0’
X
1
PGECx
PGEDx
TDI = IR0
TMS = 0
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