Intel 8XC196NT User Manual page 515

8XC196NT USER'S MANUAL
EP_REG
EP_REG
For pins configured as I/O pins, write the data to be driven out by output pins into the corresponding
EP_REG. x bits. Set the EP_REG. x bits for input pins. For pins configured as extended-address lines,
write the value of the memory page (page 00H–0FH) that is to be accessed by non-extended instruc-
tions into the EP_REG. x bits.
7
— —
Bit Bit
Number Mnemonic
7:4 —
3:0 PIN3:0
C-20
— —
Reserved; always write as zeros.
Extended Address Port Pin x Output
If EPORT. x is to be used as an output, write the data that it is to drive
out.
If EPORT. x is to be used as an input, set this bit.
If EPORT. x is to be used as an address line, write the correct value for
the memory page to be accessed by non-extended instructions.
Address:
Reset State:
PIN3 PIN2
Function
1FE5H
00H
0
PIN1 PIN0