Specifications

Élan™SC310 Microcontroller Data Sheet 69
PRELIMINARY
JTAG Instruction Opcodes
Table 36 lists the ÉlanSC310 microcontroller’s public JTAG instruction opcodes. Note that the JTAG Instruction Reg-
ister is 4 bits wide.
72 SA2 170 output
73 SA1 171 output
74 SA0 172 output
75 8042CS
173 bidir
76 DRQ2 * This pin becomes TDO when JTAGEN is High.
Table 36. ÉlanSC310 Microcontroller JTAG Instruction Opcodes
Instruction Opcode
EXTEST 0000
BYPASS 1111
SAMPLE/PRELOAD 0001
IDCODE 0010
HI-Z 0011
Table 35. Boundary Scan (JTAG) Cells—Order and Type (Continued)
Pin No. Name
Cell
Position
Cell Type Notes