Freescale Semiconductor, Inc.
EPROM/OTPROM (PROM)
9.3 EPROM/OTPROM (PROM) Programming
The internal PROM can be programmed efficiently using the Motorola
MC68HC05PGMR-2 programmer board, which can be purchased from
a Motorola-authorized distributor. The user can program the
microcontroller unit (MCU) using this printed circuit board (PCB) in
conjunction with an EPROM device already programmed with user code.
Only standalone programming is discussed in this section. For more
information concerning the MC68HC05PGMR and its usages, contact a
local Motorola representative for a copy of the MC68HC05PGMR
Programmer Board User’s Manual #2, Motorola document number
MC68HC05PGMR2/D1.
Refer to Figure 9-1 for an EPROM programming flowchart. Figure 9-2
provides a schematic of the MC68HC05PGMR PCB with the reference
designators defined in Table 9-1.
Table 9-1. MC68HC05PGMR PCB Reference Designators
Reference
Designators
Device
Type
V
Ground
+5 V
+12 V
–12 V
Notes
PP
U1
U2
2764
14, 20
20
1, 26, 27, 28
—
—
—
1
—
—
—
8
—
3
8 K x 8-bit EPROM
40-pin DIP socket
44-lead PLCC socket
Driver/receiver
MCU
40
44
16
1
U3
MCU
22
4
U4
MC145406
NMA0512S
9
—
—
VR1
2.5
6
4
DC-DC converter
Technical Data
104
MC68HC705C8A — Rev. 3
EPROM/OTPROM (PROM)
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