79RC32K438-233BB IDT, 79RC32K438-233BB Datasheet - Page 23

• Manufacturer Part Number: 79RC32K438-233BB
• Description: Processors - Application Specialized
• Manufacturer: IDT

Specifications of 79RC32K438-233BB

• Part # Aliases: IDT79RC32K438-233BB

Memory and Peripheral Bus
MADDR[21:0]
MADDR[25:22]
IDT 79RC32438
Signal
DDRDATA[31:0]
DDRADDR[13:0]
DDROEN[3:0]
DDRDM[7:0]
DDRBA[1:0]
1
DDRCMD
2
(see Chapter 7, DDR Controller, in the RC32438 User Reference Manual).
DDRDQSx
DDRDQSx
DDRCKNx
DDRCSNx
DDRCKPx
DDRCMD contains DDRRASN, DDRCASN and DDRWEN.
DDRCKE
DDRDATA is either 32-bits or 16-bits wide depending on the DBW control bit in DDRC Register
Symbol
Tdz_8a
Tzd_8a
Tdz_8b
Tzd_8b
Tdo_8a
Tdo_8b
1
1
2
2
2
2
2
NOP
Reference
EXTCLK rising
EXTCLK rising
Table 8 Memory and Peripheral Bus AC Timing Characteristics (Part 1 of 3)
Edge
Tdo_7m
Tdo_7m
Tdo_7m
Tdo_7m
RowA
ACTV
BNKx
Figure 7 DDR SDRAM Timing Waveform — Write Access
FF
200MHz
Min
0.0
0.0
0.5
0.7
1.2
0.0
NOP
Max
5.0
0.1
2.3
6.5
1.5
3.3
Tdo_7m
Col A0
WR
233MHz
Min
0.0
0.0
0.5
0.0
0.7
1.2
BNKx
23 of 59
Tdo_7k
Tdo_7l
Max
Col A2
5.0
0.1
2.3
6.5
1.5
3.3
WR
D0
DM0
266MHz
Min
0.0
0.0
0.5
0.0
0.7
1.2
DM1
D1 D2
NOP
Tdo_7k
DM2
Max
Tdo_7l
5.0
0.1
2.3
6.5
1.5
3.3
DM3
NOP
300MHz
Min
0.0
0.0
0.5
0.0
0.7
1.2
D3
Max
5.0
0.1
2.3
6.5
1.5
3.3
NOP
Unit
ns
ns
ns
ns
ns
ns
NOP
FF
Conditions
NOP
May 25, 2004
See Figures 8
and 9.
Reference
Diagram
Timing