Texas Instruments TMS380C26 - Manual (Page 12)

TMS380C26
NETWORK COMMPROCESSOR
SPWS010A–APRIL 1992–REVISED MARCH 1993
POST OFFICE BOX 1443
•
HOUSTON, TEXAS
77251–1443
12
Terminal Functions (continued)
System Interface – Intel Mode (SI/M = H)
PIN NAME NO. I/O DESCRIPTION
SYNCIN 108 IN Reserved. This signal must be left unconnected (see Note 1).
S8/SHALT 32 IN
System 8/16-bit bus select. This pin selects the bus width used for communications through the
system interface. On the rising edge of SRESET, the TMS380C26 latches the DMA bus width;
otherwise the value on this pin dynamically selects the DIO bus width.
H = Selects 8-bit mode (see Note 1).
L
= Selects 16-bit mode.
NOTE 1: Pin has an internal pullup device to maintain a high voltage level when left unconnected (no etch or loads).