MC68HC05T16 Datasheet, PDF (114/128 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit

Table 13-2 Self-Check Report
PA3 PA2 PA1 PA0
1
1
1
1
1
1
1
0
1
1
0
1
1
1
0
0
1
0
1
1
1
0
1
0
1
0
0
1
1
0
0
0
0
1
1
1
Flashing
All Others
1=LED off; 0=LED on.
REMARKS
Faulty part, port A bad
Bad I/O
Bad RAM
Bad ROM
Bad TIMER
Bad PAC
Bad ADC
Bad OSD
Bad MFT
Good Device
Bad Device, Bad Port A, etc.
13.3
Bootstrap Mode
The bootstrap mode is provided in the EPROM part (MC68HC705T16) as a mean of
self-programming its EPROM with minimal circuitry. It is entered on the rising edge of RESET if
IRQ pin is at 1.8V_DD and PC2 is at logic one. RESET must be held low for 4064 cycles after POR
(power-on reset).
13.3.1 EPROM Programming
The 4K-bytes OSD CHAR EPROM is positioned from $8000 to $8FFF, and the 23.5K-bytes user
EPROM is positioned from $A000 to $FDFF. The erased state of EPROM locations is $FF.
Programming boards are available from Motorola for programming the on-chip EPROM, please
contact your Motorola representative.
The Program Control register (PCR) is provided for EPROM programming. The function of the
EPROM depends on the device operating mode.
Please contact Motorola for Programming board availability.
13 ^{13.3.2 Program Control Register (PCR)}
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$3D
ELAT PGM 0000 0000
MOTOROLA
13-4
OPERATING MODES
TPG
MC68HC05T16