參數(shù)資料
型號: MC68HC05C8A
廠商: Motorola, Inc.
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數(shù): 99/158頁
文件大?。?/td> 773K
代理商: MC68HC05C8A
Operating Modes
Self-Check Mode
MC68HC05C8A
MC68HCL05C8A
MC68HSC05C8A
Rev. 5.0
Technical Data
MOTOROLA
Operating Modes
99
11.4 Self-Check Mode
Self-check mode is entered upon the rising edge of RESET if the IRQ pin
is at V
TST
and the TCAP pin is at logic 1.
11.4.1 Self-Check Tests
The self-check read-only memory (ROM) at mask ROM location
$1F00
$1FEF determines if the MCU is functioning properly.These tests
are performed:
1.
I/O
Functional test of ports A, B, and C
2.
Random-access memory (RAM)
Counter test for each RAM
byte
3.
Timer
Test of counter register and OCF bit
4.
Serial communications interface (SCI)
Transmission test
checks for RDRF, TDRE, TC, and FE flags
5.
Read-only memory (ROM)
Exclusive OR with odd ones parity
result
6.
Serial peripheral interface (SPI)
Transmission test checks for
SPIF and WCOL flags
The self-check circuit is shown in
Figure 11-2
.
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