參數(shù)資料
型號: MC68HC705P6AMDWR2
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝: SOIC-28
文件頁數(shù): 61/130頁
文件大?。?/td> 1541K
代理商: MC68HC705P6AMDWR2
Operating Modes
Advance Information
MC68HC705P6A — Rev. 2.0
36
Operating Modes
MOTOROLA
The mode of operation is also determined whenever the internal
computer operating properly (COP) watchdog timer resets the MCU.
When the COP timer expires, the voltage applied to the IRQ/VPP pin
controls the mode of operation while the voltage applied to PD7/TCAP is
ignored. The voltage applied to PD7/TCAP during the last rising edge on
RESET is stored in a latch and used to determine the mode of operation
when the COP watchdog timer resets the MCU.
3.3 User Mode
The user mode allows the MCU to function as a self-contained
microcontroller, with maximum use of the pins for on-chip peripheral
functions. All address and data activity occurs within the MCU and are
not available externally. User mode is entered on the rising edge of
RESET if the IRQ/VPP pin is within the normal operating voltage range.
The pinout for the user mode is shown in Figure 3-1.
Figure 3-1. User Mode Pinout
In the user mode, there is an 8-bit I/O port, a second 8-bit I/O port shared
with the analog-to-digital (A/D) subsystem, one 3-bit I/O port shared with
the serial input/output port (SIOP), and a 3-bit port shared with the 16-bit
timer subsystem, which includes one general-purpose I/O pin.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
RESET
IRQ/VPP
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
SDO/PB5
SDI/PB6
SCK/PB7
VSS
VDD
OSC1
OSC2
PD7/TCAP
TCMP
PD5
PC0
PC1
PC2
PC3/AD3
PC4/AD2
PC5/AD1
PC6/AD0
PC7/VREFH
相關(guān)PDF資料
PDF描述
MC68HC705P6ASD 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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