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參數資料
型號： MC68C912B32CFU8
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 16-Bit Microcontroller
中文描述： 16-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP80
封裝： QFP-80
文件頁數： 34/128頁
文件大小： 748K
代理商： MC68C912B32CFU8
MOTOROLA
34
MC68HC912B32
MC68HC912B32TS/D
This register is associated with external bus control signals and interrupt inputs including data bus en-
able (DBE), mode select (MODB/IPIPE1, MODA/IPIPE0), E clock, data size (LSTRB/TAGLO), read/
write (R/W), IRQ, and XIRQ. When the associated pin is not used for one of these specific functions,
the pin can be used as general-purpose I/O. The port E assignment register (PEAR) selects the function
of each pin. DDRE determines the primary direction of each port E pin when configured to be general-
purpose I/O.
Some of these pins have software selectable pull-ups (DBE, LSTRB, R/W, and XIRQ). A single control
bit enables the pull-ups for all these pins which are configured as inputs. IRQ always has a pull-up.
This register is not in the map in peripheral mode or expanded modes when the EME bit is set.
Read and write anytime.
This register determines the primary direction for each port E pin configured as general-purpose I/O.
0 = Associated pin is a high-impedance input
1 = Associated pin is an output
PE[1:0] are associated with XIRQ and IRQ and cannot be configured as outputs. These pins can be
read regardless of whether the alternate interrupt functions are enabled.
This register is not in the map in peripheral mode and expanded modes while the EME control bit is set.
Read and write anytime.
The PEAR register is used to choose between the general-purpose I/O functions and the alternate bus
control functions of port E. When an alternate control function is selected, the associated DDRE bits are
overridden.
The reset condition of this register depends on the mode of operation because bus-control signals are
needed immediately after reset in some modes.
In normal single-chip mode, no external bus control signals are needed so all of port E is configured for
general-purpose I/O.
PORTE —
Port E Register
$0008
Bit 7
6
5
4
3
2
1
Bit 0
Single Chip
PE7
PE6
PE5
PE4
PE3
PE2
PE1
PE0
RESET:
–
–
–
–
–
–
–
–
Alt. Pin
Function
DBE
MODB or
IPIPE1
MODA or
IPIPE0
ECLK
LSTRB or
TAGLO
R/W
IRQ
XIRQ
DDRE —
Port E Data Direction Register
$0009
Bit 7
6
5
4
3
2
1
Bit 0
DDE7
DDE6
DDE5
DDE4
DDE3
DDE2
0
0
RESET:
0
0
0
0
0
0
–
–
PEAR —
Port E Assignment Register
$000A
Bit 7
6
5
4
3
2
1
Bit 0
NDBE
0
PIPOE
NECLK
LSTRE
RDWE
0
0
RESET:
0
–
0
0
0
0
–
–
Normal
Expanded
RESET:
0
–
1
0
1
1
–
–
Special
Expanded
RESET:
1
–
0
1
0
0
–
–
Peripheral
RESET:
1
–
0
1
0
0
–
–
Normal
Single Chip
RESET:
0
–
1
0
1
1
–
–
Special
Single Chip
相關PDF資料
PDF描述
MC68CK338 Highly Integrated, Low-Power, 32-Bit Microcontroller
MC68EC060 32-Bit Microprocessors.(32位微處理器)
MC68EN360RC25V QUad Integrated Communications Controller Users Manual
MC68EN360CFE25 QUad Integrated Communications Controller Users Manual
MC68EN360FE25 AC 4C 4#12 PIN PLUG 023
相關代理商/技術參數
參數描述
MC68C912B32FU8 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16-Bit Microcontroller
MC68CK16Z1 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series
MC68CK16Z1CAG16 功能描述:16位微控制器 - MCU 16BIT 1KRAM 32KHZ CRYSTAL RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數據總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風格:SMD/SMT
MC68CK16Z1CAG16 制造商:Freescale Semiconductor 功能描述:Microcontroller
MC68CK16Z1CFC16 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series
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