mcf5272 Freescale Semiconductor, Inc, mcf5272 Datasheet - Page 197

• Manufacturer Part Number: mcf5272
• Description: Mcf5272 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
Figure 9-2 is the pinout of a 16-bit SDRAM in a 54-pin TSOP (thin, small-outline package)
package. Size can vary from 16–256 Mbits.
SDRAMCS/CS7
DQML
SDCLKE
SDCLK
GND
GND
VDD
VDD
VDD
VDD
VDD
Signal
SDWE
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
CAS
RAS
R/W
BA0
BA1
A10
CS
A0
A1
A2
A3
Table 9-1. SDRAM Controller Signal Descriptions (Continued)
DQML
GND
GND
VDD
DQ0
VDD
DQ1
DQ2
DQ3
DQ4
VDD
DQ5
DQ6
DQ7
VDD
CAS
RAS
VDD
R/W
BA0
BA1
A10
CS
A0
A1
A2
A3
SDRAM (bus) clock (same frequency as CPU clock). This dedicated output reduces setup and
hold time uncertainty due to process and temperature variations. SDCLK is disabled for
SDRAM power-down mode.
SDRAM clock enable
SDRAM chip select/CS7. The SDRAM is assigned to CS7 (SDRAMCS) of the device chip
select module.
SDRAM write enable
Figure 9-2. 54-Pin TSOP SDRAM Pin Definition
DQML
GND
GND
VDD
VDD
VDD
VDD
VDD
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
CAS
RAS
R/W
BA0
BA1
A10
CS
A0
A1
A2
A3
Chapter 9. SDRAM Controller
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
128 Mbit
256 Mbit
64 Mbit
Description
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
GND
DQ15
GND
DQ14
DQ13
VDD
DQ12
DQ11
GND
DQ10
DQ9
VDD
DQ8
GND
NC
DQMH
CLK
CKE
A12
A11
A9
A8
A7
A6
A5
A4
GND
SDRAM Controller Signals
GND
DQ15
GND
DQ14
DQ13
VDD
DQ12
DQ11
GND
DQ10
DQ9
VDD
DQ8
GND
NC
DQMH
CLK
CKE
A12
A11
A9
A8
A7
A6
A5
A4
GND
GND
DQ15
GND
DQ14
DQ13
VDD
DQ12
DQ11
GND
DQ10
DQ9
VDD
DQ8
GND
NC
DQMH
CLK
CKE
A12
A11
A9
A8
A7
A6
A5
A4
GND
9-3