4: PINS
S1D13806 SERIES HARDWARE FUNCTIONAL
EPSON
1-13
SPECIFICATION (X28B-A-001-03)
Note: When WAIT# is always driven, WAIT# is in its inactive state at RESET#. CONF[3:0] determines
whether WAIT# is active high or low.
WE0#
I
32
CS
Hi-Z
This is a multi-purpose pin:
For SH-3/SH-4 Bus, this pin inputs the write enable signal for the lower data byte
(WE0#).
For MC68K Bus 1, this pin must be connected to VDD
For MC68K Bus 2, this pin inputs the bus size bit 0 (SIZ0).
For Generic Bus, this pin inputs the write enable signal for the lower data byte
(WE0#).
For MIPS/ISA Bus, this pin inputs the memory write signal (MEMW#).
For Philips PR31500/31700 Bus, this pin inputs the memory write command
(/WE).
For Toshiba TX39xx Bus, this pin inputs the memory write command (WE*).
For PowerPC Bus, this pin inputs the Transfer Size 1 signal (TSIZ1).
For PC Card (PCMCIA) Bus, this pin inputs the write enable signal (-WE).
See the respective AC Timing diagram for detailed functionality.
RESET#
I
35
CS
0
Active low input that clears all internal registers and forces all outputs to their inac-
tive states. Note that active high RESET signals must be inverted before input to this
pin.
For Toshiba TX39xx Bus, this pin is called NOP*.
WAIT#
IO
39
C/TS2
Hi-Z
The active polarity of the WAIT# output is configurable; the state of CONF[3:0] on
the rising edge of RESET# defines the active polarity of WAIT# for some busses -
see “Summary of Configuration Options”.
For SH-3 Bus, this pin outputs the wait request signal (WAIT#).
For SH-4 Bus, this pin outputs the ready signal (RDY#).
For MC68K Bus 1, this pin outputs the data transfer acknowledge signal
(DTACK#).
For MC68K Bus 2, this pin outputs the data transfer and size acknowledge bit 1
(DSACK1#).
For Generic Bus, this pin outputs the wait signal (WAIT#).
For MIPS/ISA Bus, this pin outputs the IO channel ready signal (IOCHRDY).
For Philips PR31500/31700 Bus, this pin outputs the wait state signal (/CARDx-
WAIT).
For Toshiba TX39xx Bus, this pin outputs the wait state signal (CARDxWAIT*).
For PowerPC Bus, this pin outputs the transfer acknowledge signal (TA#).
For PC Card (PCMCIA) Bus, this pin outputs the wait signal
(-WAIT).
See the respective AC Timing diagram for detailed functionality.
Table 4-1 Host Interface Pin Descriptions (Continued)
Pin Name Type
Pin #
Cell
RESET#
State
Description