mt90528ag2 Zarlink Semiconductor, mt90528ag2 Datasheet - Page 21

• Manufacturer Part Number: mt90528ag2
• Description: 28-port Primary Rate Circuit Emulation Aal1 Sar
• Manufacturer: Zarlink Semiconductor

D24, C26, D25,
B21, D20, C21,
A22, B22, D21,
A23, C22, D22,
B23, A24, C23,
D23, B24, A25,
A26, B26, C24,
E23, E24, D26,
G22, F23, E25,
G23, F25, F26,
G24, H23, G25
E26, J22, F24,
Ball Pin #
B25, C25
H26
H25
H24
G26
J23
MEM_DATA[17:0]
MEM_ADD[19:0]
MEM_CS_1
MEM_CS_2
MEM_CS_3
MEM_CS_4
Pin Name
MEM_WR
I/O
I/O
Table 2 - External Memory Interface Pins
O
O
O
O
O
O
3.3 V CMOS
3.3 V, 8mA
3.3 V, 8mA
3.3 V, 8mA
3.3 V, 8mA
3.3 V, 8mA
3.3 V, 8mA
PD / 8mA
Type
Zarlink Semiconductor Inc.
MT90528
used in all memory configurations to select bank 1 of external mem-
ory.
used to enable memory bank 2 when 2 or more banks of external
RAM are connected to the MT90528.
used to enable memory bank 3 when 4 banks of external RAM are
connected to the MT90528.
used to enable memory bank 4 when 4 banks of external RAM are
connected to the MT90528.
Active LOW write enable.
follows:
Bank Size of 1 M: MEM_ADD[19:0] are connected to memory.
Bank Size of 512 K: MEM_ADD[18:0] are connected to memory.
Bank Size of 256 K: MEM_ADD[17:0] are connected to memory.
Bank Size of 128 K: MEM_ADD[16:0] are connected to memory.
Memory data lines. MEM_DATA[15:8] represent the upper byte;
MEM_DATA[7:0] represent the lower byte. Optional lines [17] and
[16] represent the high and low byte parity values, respectively.
Active LOW memory chip select signal for bank 1. This signal is
Active LOW memory chip select signal for bank 2. This signal is
Active LOW memory chip select signal for bank 3. This signal is
Active LOW memory chip select signal for bank 4. This signal is
Memory address lines. Connect these lines to external memory as
21
Description
Data Sheet