参数资料
型号: MC68HC05E1DWR2
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: SOIC-28
文件页数: 15/86页
文件大小: 491K
代理商: MC68HC05E1DWR2
General Release Specication
MC68HC05E1 — Revision 2.0
22
Operating Modes
MOTOROLA
Operating Modes
2.3 Single-Chip Mode
In single-chip mode, the address and data buses are not available
externally, but there are two 8-bit I/O ports and one 4-bit I/O port. This
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. Single-Chip Mode is
entered on the rising edge of RESET if the IRQ pin is within normal
operating range.
Figure 2-1. Single-Chip Mode Pinout of the MC68HC05E1
2.4 Self-Check Mode
The Self-Check Mode provides an internal check to determine if the
device is functional. See Figure 2-2.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
28
27
XFC
VDDSYN
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PC0
PC1
PC2
PC3
IRQ
RESET
OSC1
OSC2
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
VDD
VSS
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