MC68711E20CFNE3 Datasheet, PDF (219/242 Pages) –

Table 2. Summary of Boot-ROM-Related Features
MCU Part
MC68HC11A0
MC68HC11A1
MC68HC11A8
MC68SEC11A8
MC68HC11D3
MC68HC711D3
BOOT
ROM
Revision
(@$BFD1)
Mask Set
I.D.
(@$BFD2,3)
MCU Type
I.D.
(@$BFD4,5)
Security
Download
Length
JMP on
BRK or $00⁽¹⁾
JMP
to RAM⁽²⁾
Default
RAM
Location
PROGRAM⁽³⁾
and UPLOAD⁽⁴⁾ Notes
Utility
—
—
Mask set #
—
256
$B600
$0000 $0000–FF
—
(5)
—
—
Mask set #
—
256
$B600
$0000 $0000–FF
—
(5)
—
—
Mask set #
—
256
$B600
$0000 $0000–FF
—
(5)
—
—
Mask set # Yes
256
$B600
$0000 $0000–FF
—
(5)
$00
ROM I.D. # $11D3
—
0–192
$F000–ROM
—
$0040–FF
—
(6)
$42(B)
$0000
$71D3
—
0–192 $F000–EPROM —
$0040–FF
Yes
(6)
MC68HC811E2
—
$0000
$E2E2
—
256
$B600
$0000 $0000–FF
—
(5)
MC68SEC811E2
—
—
$E25C
Yes
256
$B600
$0000 $0000–FF
—
(5)
MC68HC11E0
—
ROM I.D. # $E9E9
—
0–512
$B600
— $0000–1FF
—
(5)
MC68HC11E1
—
ROM I.D. # $E9E9
—
0–512
$B600
— $0000–1FF
—
(5)
MC68HC11E9
—
ROM I.D. # $E9E9
—
0–512
$B600
— $0000–1FF
—
(5)
MC68SEC11E9
—
ROM I.D. # $E95C
Yes
0–512
$B600
— $0000–1FF
—
(5)
MC68HC711E9 $41(A)
$0000
$71E9
—
0–512
$B600
— $0000–1FF
Yes
MC68HC11F1
$42(B)
$0000
$F1F1
—
0–1024
$FE00
— $0000–3FF
—
(6), (7)
MC68HC11K4
$30(0) ROM I.D. # $044B
—
0–768
MC68HC711K4 $42(B)
$0000
$744B
—
0–768
$0D80
$0D80
—
$0080–37F
—
(6), (8)
—
$0080–37F
Yes
(6), (8)
NOTES:
1. By sending $00 or a break as the first SCI character after reset in bootstrap mode, a jump (JMP) is executed to the address in this table rather than
doing a download. Unless otherwise noted, this address is the start of EEPROM. Tying RxD to TxD and using a pullup resistor from TxD to V_DD will
cause the SCI to see a break as the first received character.
2. If $55 is received as the first character after reset in bootstrap mode, a jump (JMP) is executed to the start of on-chip RAM rather than doing a
download. This $55 character must be sent at the default baud rate (7812 baud @ E = 2 MHz). For devices with variable-length download, the same
effect can be achieved by sending $FF and no other SCI characters. After four SCI character times, the download terminates, and a jump (JMP) to
the start of RAM is executed.
The jump to RAM feature is only useful if the RAM was previously loaded with a meaningful program.
3. A callable utility subroutine is included in the bootstrap ROM of the indicated versions to program bytes of on-chip EPROM with data received via the
SCI.
4. A callable utility subroutine is included in the bootstrap ROM of the indicated versions to upload contents of on-chip memory to a host computer via
the SCI.
5. The complete listing for this bootstrap ROM may be found in the M68HC11 Reference Manual, Freescale document order number M68HC11RM/AD.
6. The complete listing for this bootstrap ROM is available in the freeware area of the Freescale Web site.
7. Due to the extra program space needed for EEPROM security on this device, there are no pseudo-vectors for SCI, SPI, PAIF, PAOVF, TOF, OC5F,
or OC4F interrupts.
8. This bootloader extends the automatic software detection of baud rates to include 9600 baud at 2-MHz E-clock rate.