Motorola M68EML08EY, User Manual, Page: 33 / 36

Support Information
EM Board Socket Connectors P1 and P2
User’s Manual M68EML08EY Emulation Module - Version 1.0
MOTOROLA Support Information 31
Table 3-8 EM Connector P2 Signal Descriptions
Pin Mnemonic Signal
A1 — A32 GND GROUND
B1, B32 GND GROUND
B2 VCC POWER — Operating voltage.
B3 — B7 PTC[0] —
PTC[4]
PORT C (lines 0—4) — General-purpose I/O lines controlled by
software via data direction and data registers.
B8 — B10, B13, B15,
B18 — B27, 29
NC No connection
B11 LOCKOUT_B Used by the platform board to block the IRQ_B signal during reset
recovery.
B12 T_RESET_5V_
B
Target reset used to sense and drive resets to and from the target.
B14 PORTS_B Indicates a port-related register access, which is routed to the PRU
on the platform board.
B16 PFB_RST_B PFB RESET — Active-low signal that requests a reset of the
platform board.
B17 COP_RST_B COP RESET — Active-low signal that resets the EM board.
B28 VPRU Emulation MCU voltage used by the port replacement unit on the
platform board.
B31 PFB_VCC PFB POWER — Operating voltage signal from the platform board.
C1, C32 GND GROUND
C2 VCC POWER — Operating voltage.
C3 — C9 PTA[0] —
PTA[7]
PORT A (lines 0—7) — General-purpose I/O lines controlled by
software via data direction and data registers.
C10, C23, C24, C29 NC No connection
C11 — C18 PTB[7] —
PTB[0]
PORT B (lines 0—7) — General-purpose I/O lines controlled by
software via data direction and data registers.
C19 — C22, C25 —
C28
ID9 — ID6, ID3,
ID2, MCU_ID1,
MCU_ID0
MCU identification signals used by the platform board to detect
which EM board is inserted.
C30 DAVINCI Used to indicate HC05 or HC08 EM boards.
C31 PFB_VCC PFB POWER — Operating voltage signal from the platform board.