XC800 Interface Connector

An OCDS connector is easily added to the user hardware. The OCDS interface allows application debugging and programming of on-board Flash ROM devices.

The Infineon XC800 device must be wired to the OCDS connector pins as described in the following table.

Pin	Standard OCDS Signal	XC86x Connection
TMS	Test mode select input (according to the IEEE 1149.1 Standard)	TMS pin: Use 100KOhm pull-up resistor to VCC
TDO	Test data output (according to the IEEE 1149.1 Standard)	TDO pin
CPUCLK	CPU clock (according IEEE Standard 1149.1)	Not used on KEIL ULINK
TDI	Test data input (according IEEE Standard	TDI pin: Use 100KOhm pull-up resistor to VCC
TRST	Test reset input (according IEEE Standard 1149.1)	TRST/ pin: Use 100KOhm pull-down resistor to GND
TCK	Test clock input (according IEEE Standard	TCK pin: Use 100KOhm pull-up resistor to VCC
BRKIN	Hardware break in (Infineon-specific)	BRKIN pin: Use 100KOhm pull-up resistor to VCC. Not used on KEIL ULINK
TRAP	Trap condition (Infineon-specific)	Not used on XC800 Devices
VCC	Positive Supply Voltage	Supply Voltage (+5V)
GND	Digital Ground	Digital Ground
RESET	Chip reset (Infineon specific)	RSTIN/ pin: Use 100KOhm pull-up resistor to VCC
BRKOUT	Hardware break out (Infineon-specific)	BRKOUT pin: Not used on KEIL ULINK
OCDS	Enable/Disable OCDS interface (Infineon-specific)	Not used on XC800 Devices

The pins TMS, TDO, TDI, TCK, BRKIN, BRKOUT may share I/O Port pins on some of the XC800 series devices. The pins TRST and RESET are open collector outputs on KEIL ULINK with 10K Ohm pull-up resistor to 3.3V (VCC).

Pin Connector OCDS is typically implemented using a 16-pin IDC connector with 0.1 inch (2.54mm) spacing. The connector pin-out is illustrated at the right.