LSI 53C875A technical manual IX-5

DMA

interrupt (Cont.) pending (DIP) 4-50

mode (DMODE) 4-66

SCRIPTS

pointer (DSP) 4-64pointer save (DSPS) 4-65

status (DSTAT) 4-39DMA next

address (DNAD) 4-64address 64 (DNAD64) 4-103

DMODE 2-6register 2-22

DSA

relative 5-36

relative selector (DRS) 4-102DSPS register 5-34

DSTAT 2-38,2-42,2-43 dual address cycles

command 2-6

dynamic block move selector (DBMS) 4-103

E

enable 64-bit

direct BMOV (EN64DBMV) 4-98

table indirect BMOV (EN64TIBMV) 4-98bus mastering (EBM) 4-4

I/O space (EIS) 4-4

jump on nondata phase mismatches (ENNDJ) 4-96memory space (EMS) 4-4

parity

checking 2-24checking (EPC) 4-22error response (EPER) 4-3

phase mismatch jump (ENPMJ) 4-95read

line (ERL) 4-67multiple (ERMP) 4-68

response to

reselection (RRE) 4-30selection (SRE) 4-30

wide SCSI (EWS) 4-29enabling cache mode 2-10encoded

chip SCSI ID (ENC) 4-30destination SCSI ID

(ENC) 4-35(ENID) 4-38

SCSI destination ID 5-20entry storage address (ESA) 4-106error reporting signals 3-7

even parity 2-24expansion ROM base

address (ERBA) 4-12address register 2-49

extend SREQ/SACK filtering (EXT) 4-90external

clock 6-9

memory interface 2-49configuration 2-49slow memory 2-49

external memory interface multiple byte accesses 6-11

extra clock cycle of data setup (EXC) 4-23

F

fetch

enable (FE) 4-82pin mode (FM) 4-56

FIFO

byte control (FBL[2:0]) 4-60byte control (FBL3) 4-59flags (FF[3:0]) 4-43

flags, bit 4 (FF4) 4-46

first dword 5-6, 5-14, 5-22, 5-26, 5-36flush DMA FIFO (FLF) 4-56flushing (FLSH) 4-51

FRAME/ 3-6

frequency lock (LOCK) 4-94

full arbitration, selection/reselection 4-21function complete 2-39

(CMP) 4-74, 4-77

G

general purpose (GPREG0) 4-35I/O (GPIO) 4-35I/O pin 0 3-10I/O pin 1 3-10I/O pin 2 3-10I/O pin 3 3-10I/O pin 4 3-10

pin control zero (GPCNTL0) 4-82timer expired (GEN) 4-75,4-79timer period (GEN[3:0]) 4-85timer scale factor (GENSF) 4-85

GNT/ 3-7

GPIO enable, bits [1:0] (GPIO[1:0]) 4-83GPIO enable, bits [4:2] (GPIO[4:2]) 4-83GPIO0_ FETCH/ 3-10

GPIO1_ MASTER/ 3-10GPIO2 3-10

GPIO3 3-10

GPIO4 3-10grant 3-7

H

halt SCSI clock (HSC) 4-91halting 2-42handshake-to-handshake timer

bus activity enable (HTHBA) 4-85expired (HTH) 4-76, 4-79period (HTH[3:0]) 4-83

scale factor (HTHSF) 4-85

hardware control of SCSI activity LED 2-19hardware interrupts 2-37

header type (HT) 4-8

high impedance mode (SZM) 4-90high impedance mode (ZMODE) 4-97

I

I/O 3-3instructions 5-13read command 2-5space 2-2, 2-3write command 2-5

Index IX-5