mc68hc05p9a Freescale Semiconductor, Inc, mc68hc05p9a Datasheet - Page 25
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mc68hc05p9a
Manufacturer Part Number
mc68hc05p9a
Description
Hcmos Microcontroller Unit
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC05P9A.pdf
(158 pages)
- Current page: 25 of 158
- Download datasheet (573Kb)
Self-Check Mode
11-mc68hc05p9a
MOTOROLA
The self-check program resides at mask ROM locations $1F00 to
$1FEF. This program is designed to check the part’s functionality with a
minimum of support hardware. The COP subsystem is disabled in the
self-check mode so that routines that feed the COP do not exist in the
self-check program.
The self-check mode is entered on the rising edge of RESET if the IRQ
pin is driven to double the supply voltage and the TCAP/PD7 pin is at
logic 1. RESET must be held low for 4064 cycles after POR or for a time,
t
are tested. Self-check results (using LEDs as monitors) are shown in
Table
self-check code. The self-check code is subject to change at any time to
improve testability or manufacturability.
RL
Freescale Semiconductor, Inc.
, for any other reset. After reset, the I/O, RAM, ROM, timer, and SIOP
For More Information On This Product,
3. It is not recommended that the user code use any of the
0 indicates LED is on; 1 indicates LED is off.
PC2
Go to: www.freescale.com
0
0
0
1
1
All Others
Flashing
PC1
Memory
Table 3. Self-Check Results
0
1
1
0
0
PC0
1
0
1
0
1
Bad I/O
Bad RAM
Bad Timer
Bad ROM
Bad Serial
Good Device
Bad Device
Remarks
Self-Check Mode
Memory
25
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