MC68HC05BD3 Datasheet, PDF (92/112 Pages) Motorola, Inc – HCMOS microcontroller

Table 11-2 Self-Check Report
PB3 PB1 PB0
Flashing
1
1
0
1
0
1
1
0
0
0
1
1
1=LED off, 0=LED on
REMARKS
O.K. (self-check is on-going)
Bad I/O
BAD RAM
BAD ROM
BAD IRQ
11.3
Bootstrap Mode
The bootstrap mode is provided in the EPROM part (MC68HC705BD3) 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 PB5 is at logic one. RESET must be held low for 4064 cycles after POR
(power-on reset) or for a time t_RL for any other reset. The user EPROM consists of 7.75K-bytes,
from location $2000 to $3EFF.
Refer to Section 15 for further details on MC68HC705BD3.
11
MOTOROLA
11-4
OPERATING MODES
TPG
MC68HC05BD3