MC68HC711E20CFN2

Manufacturer Part NumberMC68HC711E20CFN2
DescriptionIC MCU 20K 2MHZ OTP 52-PLCC
ManufacturerFreescale Semiconductor
SeriesHC11
MC68HC711E20CFN2 datasheets
 


Specifications of MC68HC711E20CFN2

Core ProcessorHC11Core Size8-Bit
Speed2MHzConnectivitySCI, SPI
PeripheralsPOR, WDTNumber Of I /o38
Program Memory Size20KB (20K x 8)Program Memory TypeOTP
Eeprom Size512 x 8Ram Size768 x 8
Voltage - Supply (vcc/vdd)4.5 V ~ 5.5 VData ConvertersA/D 8x8b
Oscillator TypeInternalOperating Temperature-40°C ~ 85°C
Package / Case52-PLCCLead Free Status / RoHS StatusContains lead / RoHS non-compliant
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Listing 3. MC68HC711E9 Bootloader ROM
Listing 3. MC68HC711E9 Bootloader ROM
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****************************************************
2
* BOOTLOADER FIRMWARE FOR 68HC711E9 - 21 Aug 89
3
****************************************************
4
* Features of this bootloader are...
5
*
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* Auto baud select between 7812.5 and 1200 (8 MHz)
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* 0 - 512 byte variable length download
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* Jump to EEPROM at $B600 if 1st download byte = $00
9
* PROGRAM - Utility subroutine to program EPROM
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* UPLOAD - Utility subroutine to dump memory to host
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* Mask I.D. at $BFD4 = $71E9
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****************************************************
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* Revision A -
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*
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* Fixed bug in PROGRAM routine where the first byte
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* programmed into the EPROM was not transmitted for
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* verify.
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* Also added to PROGRAM routine a skip of bytes
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* which were already programmed to the value desired.
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*
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* This new version allows variable length download
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* by quitting reception of characters when an idle
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* of at least four character times occurs
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*
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****************************************************
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* EQUATES FOR USE WITH INDEX OFFSET = $1000
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*
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
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*
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