ml675050 Oki Semiconductor, ml675050 Datasheet - Page 17

• Manufacturer Part Number: ml675050
• Description: Arm7tdmi Based Micro-controller For Ic Card Reader/writer
• Manufacturer: Oki Semiconductor

PIN DISCRIPTION (EXTERNAL BUS SIGNALS)
Pin name
External Bus and control signals (for ROM, SRAM, SDRAM, I/O)
XA[23:0]
XD[15:0]
ROMCS_N
RAMCS_N
IOCS0_N
IOCS1_N
SDCS_N
RD_N
WR_N
BS0_N
BS1_N
SDCLK
SDRAS_N
SDCAS_N
SDCKE
OKI Semiconductor
Discript in
FUNCTION
LIST
Ext. Address
Ext. Data
Ext. ROM
Chip Select
Ext. RAM
Chip Select
Ext. I/O 0
Chip Select
Ext. I/O 1
Chip Select
Ext. SDRAM
Chip Select
Ext.
Read Enable
Ext.
Write pulse
Ext. Byte
Select
Ext. SDRAM
CLK
Ext. SDRAM
RAS
Ext. SDRAM
CAS
Ext. SDRAM
CKE
IO
IO
O
O
O
O
O
O
O
O
O
O
O
O
O
Discript in detail
(Inside the parentheses the QFP pin number is shown)
Address bus to external RAM, external ROM,
external I/O banks and external SDRAM.
(89, 90, 91, 92, 100, 101, 102, 103, 107, 108,
Data bus to external RAM, external ROM,
external I/O banks and external SDRAM.
(156, 157, 158, 159, 162, 163, 164, 165,
ROM bank chip enable.
(73)
SRAM bank chip enable.
(74)
I/O chip enable 0.
(69)
I/O chip enable 1.
(72)
SDRAM chip enable.
(120)
Read enable/Output enable
(124)
Write pulse/Write enable
(79)
Byte select
BS1_N is for MSB, BS0_N is for LSB.
(83, 84)
SDRAM clock
(Same as operating frequency, Max. 64MHz)
(111)
Raw address strobe for SDRAM
(121)
Column address strobe for SDRAM
(122)
Clock enable for SDRAM
(123)
131, 132, 133, 136, 137, 138, 143, 144, 145,
148, 149, 150, 154, 155)
166,167, 171, 172, 173, 174, 175, 176)
Primary/
Secondary/
Tertiary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
FEDL675050-02
ML675050
Logic
Positive
Positive
Negative
/
Negative
Negative
Negative
Negative
Negative
Negative
Negative
-
Negative
Negative
-
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