MC68HC711E20CFN2 Freescale Semiconductor, MC68HC711E20CFN2 Datasheet - Page 222

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MC68HC711E20CFN2

Manufacturer Part Number
MC68HC711E20CFN2
Description
IC MCU 20K 2MHZ OTP 52-PLCC
Manufacturer
Freescale Semiconductor
Series
HC11r
Datasheets

Specifications of MC68HC711E20CFN2

Core Processor
HC11
Core Size
8-Bit
Speed
2MHz
Connectivity
SCI, SPI
Peripherals
POR, WDT
Number Of I /o
38
Program Memory Size
20KB (20K x 8)
Program Memory Type
OTP
Eeprom Size
512 x 8
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
52-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Listing 3. MC68HC711E9 Bootloader ROM
Listing 3. MC68HC711E9 Bootloader ROM
1
****************************************************
2
* BOOTLOADER FIRMWARE FOR 68HC711E9 - 21 Aug 89
3
****************************************************
4
* Features of this bootloader are...
5
*
6
* Auto baud select between 7812.5 and 1200 (8 MHz)
7
* 0 - 512 byte variable length download
8
* Jump to EEPROM at $B600 if 1st download byte = $00
9
* PROGRAM - Utility subroutine to program EPROM
10
* UPLOAD - Utility subroutine to dump memory to host
11
* Mask I.D. at $BFD4 = $71E9
12
****************************************************
13
* Revision A -
14
*
15
* Fixed bug in PROGRAM routine where the first byte
16
* programmed into the EPROM was not transmitted for
17
* verify.
18
* Also added to PROGRAM routine a skip of bytes
19
* which were already programmed to the value desired.
20
*
21
* This new version allows variable length download
22
* by quitting reception of characters when an idle
23
* of at least four character times occurs
24
*
25
****************************************************
26
27
* EQUATES FOR USE WITH INDEX OFFSET = $1000
28
*
29 0008
PORTD
30 000E
TCNT
31 0016
TOC1
32 0023
TFLG1
33
* BIT EQUATES FOR TFLG1
34 0080
OC1F
35
*
36 0028
SPCR
37 002B
BAUD
38 002D
SCCR2
39 002E
SCSR
40 002F
SCDAT
41 003B
PPROG
42
* BIT EQUATES FOR PPROG
43 0020
ELAT
44 0001
EPGM
45
*
46
47
* MEMORY CONFIGURATION EQUATES
48
*
49 B600
EEPMSTR
50 B7FF
EEPMEND
51
*
222
EQU
$08
EQU
$0E
EQU
$16
EQU
$23
EQU
$80
EQU
$28
(FOR DWOM BIT)
EQU
$2B
EQU
$2D
EQU
$2E
EQU
$2F
EQU
$3B
EQU
$20
EQU
$01
EQU
$B600
Start of EEPROM
EQU
$B7FF
End of EEPROM
M68HC11 Bootstrap Mode, Rev. 1.1
Freescale Semiconductor

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