Integrated controller/processor for disc drive having direct memory access

5p_interface blk

PAD D IN( 15.-0)

PAD"A0 5:0)

PACTCSBUFb

PACTCSCHPb

PACTCSEXTb

PAD~WRHb

PAD~WRLb

PATTRDb

0)

EMUL_MODE
RESETb PAD_D OUT(I5:0)
PAD_D_0Eb
FLASHJVRb

PCLK.
PCLK OEb

READYb

C55SPb
5SP WRb
SSP_BHEb

CSCHPb
REG_Af7:0)

REG RDb
RD BANXlb
RDHBANKOb
WR D ODD(7:0)
WR"D"EVEN(7:0)
W ADD(7:0)
WR BANKIb
WRTBANKOb
WRH 50b
WRT50b
WRH~40b
WRT40b

BUF REQb
BUF_RMb
BUF SIZE
BUF AT0:0)
BUF_D_OUT(I5:0)

BUF_D_IN( 15:0) SEL_EXT5RVCLK
5RVCLKSEL(2:0)
PACK_MODE

CLMOM UP_ck_5EL
DSC20M CPU D 0UT(I5:0)

CPU D OEb

CPU~D~IN(I5:

CPLTAfl 5:0)

CPlTCSBUFb

CPU"CSCHPb

CPtTCSEXTb

CPU~WRHb

CPU~WRH>

CPU"RDb

REG_D_IN(I5:0)
BUF ACKb

ASSIST RDYb

901

Microprocessor
Interface

Figure SB