CS98000
32
DS525PP1
Pin
Signal Name
Type
Description
87, 83, 79, 76,
74, 71, 68, 64,
67, 70, 72, 75,
78, 80, 86, 88,
60, 56, 54, 49,
46, 44, 40, 33,
37, 42, 45, 48,
51, 55, 59. 62
M_D[31..0]
B
Memory Data Bus. CS98000 can use all 32 bits or can use
only M_D[15..0], in which case M_D[31..16] can be left un-con-
nected.
2, 3, 5, 6, 7, 9,
10, 11, 13, 14,
15, 16
M_A[11..0]
O
Memory Address Bus. Connect in order starting with M_A[0] to
all RAM address pins not already connected to M_BS_L or
M_AP. Unused upper M_A pins unconnected.
19
M_CKO
O
Memory Clock
22
M_CKE
O
Memory Clock Enable
21
M_BS_L
O
Bank Selection. Always connect to RAM BS or BS0 pin.
23
M_AP
O
Memory Auto Pre-charge. Always connect to RAM AP pin.
24
M_RAS_L
O
Memory Row Address Strobe
25
M_CAS_L
O
Memory Column Address Strobe
27
M_WE_L
O
Memory Write Enable
32, 31, 29, 28
M_DQM[3..0]
O
IO Mask of Data Bus M_DQM[3] -> M_D[31:24]
Table 8. SDRAM Interface
Pin
Signal Name
Type
Description
60, 56, 54, 49,
46, 44, 40, 33,
37, 42, 45, 48,
51, 55, 59. 62
M_D[15..0]
B
Memory Data Bus. Use M_D[7:0] for 8-bit interface
2, 3, 5, 6, 7, 9,
10, 11, 13, 14,
15, 16
M_A[11..0]
O
Memory Address Bus[11..0]
74, 71, 68, 64,
67, 70, 72, 75,
78, 80, 86, 88
M_D[27..16]
O
Memory Address Bus[23..12] For
16-bit data mode, M_D[26:16] is upper word address.
For 8-bit data mode, M_D[27:16] is upper byte address.
83
M_D[30]
O
Address decode low. Copy of address MSB.
87
M_D[31]
O
Address decode high. Compliment of address MSB.
60
NVM_WE_L
O
NVRAM Write Enable.
62
NVM_OE_L
O
ROM/NVRAM Output Enable.
Table 9. ROM/NVRAM Interface
Содержание Crystal CS98000 Series
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