MC68HC711PH8 Motorola, MC68HC711PH8 Datasheet - Page 69
MC68HC711PH8
Manufacturer Part Number
MC68HC711PH8
Description
High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit
Manufacturer
Motorola
Datasheet
1.MC68HC711PH8.pdf
(264 pages)
- Current page: 69 of 264
- Download datasheet (2Mb)
PH8.DS03/Modes+mem
3.4
3.4.1
Using the on-chip EPROM programming feature requires an external power supply (V
programming is accomplished using the EPROG register. Program EPROM at room temperature
only and place an opaque label over the quartz window during and after programming.
The CSEL bit in the OPTION register selects an on-chip oscillator clock for programming the
EPROM while operating at frequencies below 1MHz.
The erased state of each EPROM byte is $FF.
3.4.1.1
MBE — Multiple byte program enable
This bit may be read or written only in special modes; it will always read zero in normal modes.
EPROM is made up of three blocks of 16K bytes. When programming, address bits 4 and 7 are
ignored, so that 4 addresses per block are programmed simultaneously. Address bits 14 and 15
are also ignored so that a total of twelve addresses are written at once, four in each 16K byte block.
For example, with the EPROM mapped to $4000–$FFF, a write to $4026 will actually program
$4026, $4036, $40A6, $40B6, $8026, $8036, $80A6, $80B6, $C026, $C036. $C0A6 and $C0B6
(i.e. %xx00 0000 x01x 0110).
Bits [6, 2, 1] — Not implemented; always read zero.
ELAT — EPROM latch control
ELAT may be read and written at any time.
When set, this bit causes the address and data for writes to the EPROM to be latched.
MC68HC11PH8
EPROM programming (EPROG)
1 (set)
0 (clear) –
1 (set)
0 (clear) –
EPROM , EEPROM and CONFIG register
EPROM
EPROG — EPROM programming control register
–
–
Program 12 bytes with the same data.
Normal programming.
EPROM address and data buses configured for programming.
EPROM cannot be read.
EPROM address and data buses configured for normal operation.
OPERATING MODES AND ON-CHIP MEMORY
Address
—this line does not form part of the document—
$002B
MBE
bit 7
bit 6
0
ELAT EXCOL EXROW
bit 5
bit 4
bit 3
bit 2
0
[DS97 v 4.1] 08/Apr/97@13:55
bit 1
0
EPGM 0000 0000
bit 0
PPE
MOTOROLA
). Normal
on reset
State
TPG
3-23
10
12
13
14
15
11
1
2
3
4
5
6
7
8
9
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