MC9RS08KA1 FREESCALE [Freescale Semiconductor, Inc], MC9RS08KA1 Datasheet - Page 103

• Manufacturer Part Number: MC9RS08KA1
• Description: RS08 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

12.5
BDC commands are sent serially from a host computer to the BKGD pin of the target MCU. All commands
and data are sent MSB-first using a custom BDC communications protocol. Active background mode
commands require that the target MCU is currently in the active background mode while non-intrusive
commands may be issued at any time whether the target MCU is in active background mode or running a
user application program.
Table 12-2
meaning of each command.
Coding Structure Nomenclature
The following nomenclature is used in
1. The RS08 CPU uses only 14 bits of address and occupies the lower 14 bits of the 16-bit AAAA address field. The values of
address bits 15 and 14 in AAAA are truncated and thus do not matter.
Freescale Semiconductor
soft-reset
WBKP
Reset
WD16
RBKP
AAAA
RD16
Any
WD
W
RD
CC
R
SS
RS08 BDC Commands
d
/
shows all RS08 BDC commands, a shorthand description of their coding structure, and the
15
0
0
=
=
=
=
=
=
=
=
=
=
=
=
= Unimplemented or Reserved
14
0
0
Commands begin with an 8-bit command code in the host-to-target direction
(most significant bit first)
Separates parts of the command
Delay 16 to 511 target BDC clock cycles
Delay of at least 512 BDC clock cycles from last host falling-edge
16-bit address in the host-to-target direction
Eight bits of read data in the target-to-host direction
Eight bits of write data in the host-to-target direction
16 bits of read data in the target-to-host direction
16 bits of write data in the host-to-target direction
the contents of BDCSCR in the target-to-host direction (STATUS)
Eight bits of write data for BDCSCR in the host-to-target direction (CONTROL)
16 bits of read data in the target-to-host direction (from BDCBKPT breakpoint
register)
16 bits of write data in the host-to-target direction (for BDCBKPT breakpoint
register)
A13
13
0
Figure 12-7. BDC Breakpoint Match Register (BDCBKPT)
A12
12
0
MC9RS08KA2 Series Data Sheet, Rev. 3
A11
11
0
Table 12-2
A10
10
0
A9
0
9
to describe the coding structure of the BDC commands.
A8
0
8
A7
7
0
A6
0
6
1
A5
0
5
A4
Chapter 12 Development Support
4
0
A3
0
3
A2
0
2
A1
1
0
103
A0
0
0