NXP Semiconductors S12ZVM12EVB, User Manual, Page: 8 / 32

2.10 External BDM Connector, J34
A BDM interface for MCU code download and debugging is provided.
Table 8. External BDM connector
Interface pin Signal name MCU signal Description Direction
1 BKGD BKGD Background Digital Input
2 GND — Ground reference Power Reference
3 PDO PS5/PDO Extended DBG module
data output
Digital Output
4 RESET_B RESET Reset Digital Bidirectional
5 PDOCLK PS4/PDOCLK Extended DBG module
data clock
Digital Output
6 VDDX_BDM VDDX 5 V supply to external
BDM interface
Power Supply
2.11 Extended DBG Module Header, J38
The PDO and PDOCLK signals to the DBG extended debug module are available for interfacing with dedicated debug
hardware.
Table 9. Extended DBG module header
Interface pin Signal name MCU signal Description Direction
1 PDO PS5/PDO Extended DBG module
data output Digital Output
2 PDOCLK PS4/PDOCLK Extended DBG module
data clock Digital Output
2.12 BDM Connector for OSBDM Microcontroller, J1
A BDM interface is provided to load code to the OSBDM microcontroller, U1.
Table 10. BDM connector for OSBDM microcontroller
Interface pin Signal name OSBDM MCU signal Description Direction
1 U_BKGD BKGD Background Digital Input
2 GND — Ground reference Power Reference
3 — — (Not connected) —
4 U_RESET RESET Reset Digital Bidirectional
5 — — (Not connected) —
6 +5 VU VDD1 5 V supply from
OSBDM USB interface
Power Supply
Interface Description
S12ZVM12EVB Evaluation Board User Guide, Rev. 2, 03/2016
8 Freescale Semiconductor, Inc.