MC68HC705T16 MOTOROLA [Motorola, Inc], MC68HC705T16 Datasheet - Page 114

• Manufacturer Part Number: MC68HC705T16
• Description: High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit
• Manufacturer: MOTOROLA [Motorola, Inc]

13
13.3
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
(power-on reset).
13.3.1
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.
13.3.2
MOTOROLA
13-4
Address
$3D
Bootstrap Mode
EPROM Programming
Program Control Register (PCR)
bit 7
DD
1=LED off; 0=LED on.
and PC2 is at logic one. RESET must be held low for 4064 cycles after POR
PA3
1
1
1
1
1
1
1
1
0
bit 6
PA2
1
1
1
1
0
0
0
0
1
All Others
Flashing
Table 13-2 Self-Check Report
bit 5
OPERATING MODES
PA1
1
1
0
0
1
1
0
0
1
bit 4
PA0
1
0
1
0
1
0
1
0
1
bit 3
Bad Device, Bad Port A, etc.
Faulty part, port A bad
bit 2
Good Device
REMARKS
Bad TIMER
Bad ROM
Bad RAM
Bad OSD
Bad ADC
Bad MFT
Bad PAC
Bad I/O
ELAT
bit 1
PGM
bit 0
0000 0000
on reset
MC68HC05T16
State
TPG