参数资料
型号: PIC18F8720T-E/PT
厂商: Microchip Technology
文件页数: 138/165页
文件大小: 0K
描述: IC PIC MCU FLASH 64KX16 80TQFP
标准包装: 1,200
系列: PIC® 18F
核心处理器: PIC
芯体尺寸: 8-位
速度: 25MHz
连通性: EBI/EMI,I²C,SPI,UART/USART
外围设备: 欠压检测/复位,LVD,POR,PWM,WDT
输入/输出数: 68
程序存储器容量: 128KB(64K x 16)
程序存储器类型: 闪存
EEPROM 大小: 1K x 8
RAM 容量: 3.75K x 8
电压 - 电源 (Vcc/Vdd): 4.2 V ~ 5.5 V
数据转换器: A/D 16x10b
振荡器型: 外部
工作温度: -40°C ~ 125°C
封装/外壳: 80-TQFP
包装: 带卷 (TR)
配用: XLT80PT3-ND - SOCKET TRAN ICE 80MQFP/TQFP
AC164320-ND - MODULE SKT MPLAB PM3 80TQFP
AC174011-ND - MODULE SKT PROMATEII 80TQFP
PIC18F6520/8520/6620/8620/6720/8720
DS39609B-page 72
2004 Microchip Technology Inc.
If the device fetches or accesses external memory
while EBDIS = 1, the pins will switch to external bus. If
the EBDIS bit is set by a program executing from
external memory, the action of setting the bit will be
delayed until the program branches into the internal
memory. At that time, the pins will change from
external bus to I/O ports.
When the device is executing out of internal memory
(EBDIS = 0) in Microprocessor with Boot Block mode,
or Extended Microcontroller mode, the control signals
will NOT be active. They will go to a state where the
AD<15:0> and A<19:16> are tri-state; the CE, OE,
WRH, WRL, UB and LB signals are ‘1’ and ALE and
BA0 are ‘0’.
TABLE 6-1:
PIC18F8X20 EXTERNAL BUS – I/O PORT FUNCTIONS
Name
Port
Bit
Function
RD0/AD0
PORTD
bit 0
Input/Output or System Bus Address bit 0 or Data bit 0.
RD1/AD1
PORTD
bit 1
Input/Output or System Bus Address bit 1 or Data bit 1.
RD2/AD2
PORTD
bit 2
Input/Output or System Bus Address bit 2 or Data bit 2.
RD3/AD3
PORTD
bit 3
Input/Output or System Bus Address bit 3 or Data bit 3.
RD4/AD4
PORTD
bit 4
Input/Output or System Bus Address bit 4 or Data bit 4.
RD5/AD5
PORTD
bit 5
Input/Output or System Bus Address bit 5 or Data bit 5.
RD6/AD6
PORTD
bit 6
Input/Output or System Bus Address bit 6 or Data bit 6.
RD7/AD7
PORTD
bit 7
Input/Output or System Bus Address bit 7 or Data bit 7.
RE0/AD8
PORTE
bit 0
Input/Output or System Bus Address bit 8 or Data bit 8.
RE1/AD9
PORTE
bit 1
Input/Output or System Bus Address bit 9 or Data bit 9.
RE2/AD10
PORTE
bit 2
Input/Output or System Bus Address bit 10 or Data bit 10.
RE3/AD11
PORTE
bit 3
Input/Output or System Bus Address bit 11 or Data bit 11.
RE4/AD12
PORTE
bit 4
Input/Output or System Bus Address bit 12 or Data bit 12.
RE5/AD13
PORTE
bit 5
Input/Output or System Bus Address bit 13 or Data bit 13.
RE6/AD14
PORTE
bit 6
Input/Output or System Bus Address bit 14 or Data bit 14.
RE7/AD15
PORTE
bit 7
Input/Output or System Bus Address bit 15 or Data bit 15.
RH0/A16
PORTH
bit 0
Input/Output or System Bus Address bit 16.
RH1/A17
PORTH
bit 1
Input/Output or System Bus Address bit 17.
RH2/A18
PORTH
bit 2
Input/Output or System Bus Address bit 18.
RH3/A19
PORTH
bit 3
Input/Output or System Bus Address bit 19.
RJ0/ALE
PORTJ
bit 0
Input/Output or System Bus Address Latch Enable (ALE) Control pin.
RJ1/OE
PORTJ
bit 1
Input/Output or System Bus Output Enable (OE) Control pin.
RJ2/WRL
PORTJ
bit 2
Input/Output or System Bus Write Low (WRL) Control pin.
RJ3/WRH
PORTJ
bit 3
Input/Output or System Bus Write High (WRH) Control pin.
RJ4/BA0
PORTJ
bit 4
Input/Output or System Bus Byte Address bit 0.
RJ5/CE
PORTJ
bit 5
Input/Output or System Bus Chip Enable (CE) Control pin.
RJ6/LB
PORTJ
bit 6
Input/Output or System Bus Lower Byte Enable (LB) Control pin.
RJ7/UB
PORTJ
bit 7
Input/Output or System Bus Upper Byte Enable (UB) Control pin.
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