AMD SC400

About

L_AMD-ElanSC400-66AC.jpg

The SC400 is a 66Mhz System-On-Chip produced by AMD. It is powering devices such as the usr2450, the RG1000, or others.

JTAG pins on the PC Card Socket A

The has some references:

— PC card socket A
TCK : in bit; — This is also MCELA, which is an output
TMS : in bit; — This is also MCEHA, which is an output
TDI : in bit; — This is also RSTA, which is an output
TDO : out bit; — This is also REGA, which is an output

The manual also makes reference to JTAG pins multiplexed on the PC card controller:

Five pins— BNDSCN_TDI, BNDSCN_TMS, BNDSCN_TCK, BNDSCN_TDO, and BNDSCN_EN. On the √ČlanSC400 microcontroller, only the BNDSCN_EN pin is dedicated; the other four are multiplexed with the PC Card controller signals. All five boundary-scan interface pins are dedicated on the √ČlanSC410 microcontroller.

Another 21096.pdf has the TDI (RSTA - pin58), TDO (REGA# - pin61), TMS (MCEHA# - pin42), TCK (MCELA# - pin7) pins identified:

sc400-jtag.png
sc400pins2.png
sc400pins.png

Links