Debugging Support - Fujitsu MB88121 Application Note

3.4 Debugging support

The MB88121 offering also debug support at some pins.
CC pin Nr Name
7 SDS
8 CYCS0
14 CYCS
23 MT
38 MBSU_TX1
39 MBSU_RX1
44 MBSU_TX2
45 MBSU_RX2
The gray shaded pins are only available in 16-bit multiplexed mode.
After power on / reset these pins are set to output driving Low level.
The upper 16-bit (Bit 31..16) of CUS2 Register is called Debug support register (DBGS),
having the offset address 0x08 (0x50.0008) . Via these pins the output of the dedicated
debug signal is controlled.
© Fujitsu Microelectronics Europe GmbH
Interfacing MB91460 TO MB88121
Chapter 3 Software
CC debug pins
Function
Start of dynamic segment
Cycle 0 start
Cycle start
Macrotick start
Message buffer status update port
Table 3-19: Debug pins on MB88121
- 45 -
I/O type Configuration register
OUT
OUT
OUT
OUT
Debug support register
DBGS
OUT
MCU-AN-300016-E-V10