Order hotline: (386) 774-7785

The World’s Leading Device Programmers

My Shopping Cart

0 Items

Dataman S4 Programming The 68HC711

Several members of the Motorola 68HC711 microcontroller can be programmed using the S4 and a DIY pin adapter. These include the E9, KA2 and K4 versions, which have a mode (EPROM emulation) in which they may be programmed as a 27256 EPROM.

Wiring details for the pin adapters may be found in Motorola's literature. As an example, the adapter configuration for the E9 device, in SDIP 56-pin / PLCC 52-pin packages, are as follows:

Header
1
2
3
4
5
6
7
8
9
10
11
12
13
14
 
15
16
17
18
19
20
21
22
23
24
25
26
27
28

Vpp
A12
A7
A6
A5
A4
A3
A2
A1
A0
D0
D1
D2
GND

D3
D4
D5
D6
D7
CEn
A10
OEn
A11
A9
A8
A13
A14
VCC
PLCC 52-Pin
18
38
16
15
14
13
12
11
10
9
20
21
22
1

23
24
25
4
6
19
40
35
39
41
42
37
--
26
SDIP 56-Pin
18
41
16
15
14
13
12
11
10
9
20
22
23
28

24
25
26
4
6
19
43
38
42
44
45
40
--
27
Pin Name
XIRQn
PB4
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
PD0/RxD
PD1/TxD
PD2/MISO
VSS

PD3/MOSI
PD4/SCK
PD5/SS
STRA/ASPB54
STRB/R/W
/IRQ
PB2
PB7
PB3
PB1
PB0
PB5
N.C.
VDD

The following pins should be left unconnected (floating):

  • PLCC52
    • 5 (E)
    • 8 (XTAL)
    • 28 (PA6)
    • 29 (PA5)
    • 30 (PA4)
  • SDIP56
    • 5 (E)
    • 8 (XTAL)
    • 31 (PA6)
    • 32 (PA5)
    • 33 (PA4)

All other pins should be connected to GND (VSS).

Although the 68HC711-E9 "emulates" a 27256, in that it is programmed by pulses on the /CE line, it contains only 12 kbytes of ROM versus the 27256's 32 kbytes, and has no A14. This must be borne in mind during loading and programming. If S4 is simply told to load or program a 27256, it will read or program the memory of the 68HC711 twice, once for each possible state of A14. You should therefore restrict the S4's load or program range to 3000H bytes. The memory on the 68HC711 is addressed from D000H through FFFFH and this is the preferred range to set. At the LOAD or BURN option, set the first address field (memory start address) to 0D000. S4 will display as follows:

  • 0D000-0FFFF#05000

S4 itself has set the third field to 05000. This is perfectly alright, as the 68HC711 has no A14 or A15 and cannot tell the difference between 0D000H and 05000H (or 01000H, or 09000H).

The programming algorithm specified by Motorola is as follows:

  • Vcc 5 volts
  • Vpp 12.25 volts
  • Pulse 5 milliseconds