MB86391 Datasheet, PDF (14/69 Pages) Fujitsu Component Limited. – MPEG2 1chip Audio/Video Encoder

2.3.2 Host/SDRAM interface
FUJITSU LIMITED
Proprietary and Confidential
Table 2.3.2 : Host/SDRAM interface pins
Pin No.
Pin symbol
44
BCLK
88,89
ADRS27:26
90 to 92,
116 to 114,
107 to 101,
ADRS17:2
111 to 113
55 to 50,48,47,
56 to 60,
63 to 65, _D31:0
74 to 67,75,76,
79 to 81,
83 to 85
32,31
IRQ9:8
23
XAS
22
XRDWR
41
43,42
30
29
36
38
37
21
39
40
95
XCS0
XCS5:4
XBMREQ
XBREQ
XBGRNT
XBUSEN
BUSDIR
XREADY
XEXTIRPT
XERROR
XSPWE
94
XSPCAS
93
XSPRAS
98
SPCKE
97
SPSDCLK
Pin name Bit I/O Active
Bus Clock 1 O −
Address
27:26
2 I/O
−
Address
17:2
16 I/O
−
Data31:0 32 I/O −
Interrupt
Request 9:8
2
I
L
Address _{1 I/O L}
Strobe
Read/Write 1 I/O −
Chip Select _{1 O}
L
0
Chip Select
5:4
2
O
L
Burst Mode
Request
1
I
L
Bus
Request
1
I
L
Bus Grant 1 O L
Bus Buffer
Enable
1
O
L
Bus Buffer _{1 O}
Direction
−
Ready 1 I/O L
External
Interrupt
1O
L
Error
1O L
Write
Enable
1O
L
Column
Address 1 O L
Strobe
Row
Address 1 O L
Strobe
Clock
1O H
Enable
SDRAM
Clock
1O
−
Pull
up/down
Pin function
−
Host/SDRAM interface bus clock
(27MHz) output pin
−
Address (upper 2bits) I/O pins
Address (lower 16bits) I/O pins
−
32bit data I/O pins
−
pullup
−
−
pullup
−
pullup
pullup
−
−
−
−
−
−
−
−
−
Interrupt request input pins. When not in
use, connect to either OPEN or VDDE.
Address strobe I/O pin
Read/write I/O pin:
‘H’ = Read
‘L’ = Write
Chip select 0 output pin
Chip select 5:4 output pins
Burst transfer request input pin
Bus privilege request input pin
Bus grant output pin
Bus buffer enable output pin
Bus buffer direction control output pin
Ready I/O pin
External host interruption request pin
Error output pin
Write enable output pin to SDRAM
connected to host/SDRAM interface
Column address strobe output pin to
SDRAM connected to host/SDRAM
interface
Row address strobe output pin to SDRAM
connected to host/SDRAM interface
−
Clock enable output pin to SDRAM
connected to host/SDRAM interface
−
Clock output pin to SDRAM connected to
hos t/SDRAM interface
MB86391
Product Specification
Rev. 1.1
12, November 2001
10