PNX1302EH NXP Semiconductors, PNX1302EH Datasheet - Page 184

• Manufacturer Part Number: PNX1302EH
• Manufacturer: NXP Semiconductors

Specifications of PNX1302EH

• Lead Free Status / RoHS Status: Not Compliant

PNX1300/01/02/11 Data Book
12.4
All devices must have a LVTTL, 3.3-V interface.
Table 12-2
in a 32-bit memory interface.
Table 12-2. Supported Rank Configurations (32-bit)
Refer to
evaluate the support of 2-bank, 64-Mbit devices. These
devices are not widely used. Hence they are not de-
scribed in this document.
Table 12-3
in a 16-bit memory interface.
Table 12-3. Supported Rank Configurations (16-bit)
12-2
Figure 12-1. PNX1300 internal highway bus to the external glueless SDRAM interface.
Device Size
Device Size
(Mbit)
(Mbit)
1. Limited support for a 32-MB configuration only.
2. However MM_CONFIG.SIZE may be set to
3. Limited support for a 64-MB configuration only.
4. However MM_CONFIG.SIZE is 32 MB (i.e. 7).
128
256
128
128
256
16
64
16
64
MEMORY DEVICES SUPPORTED
16MB (i.e. 6). Refer to
Figure 12-11
details.
1
3
Section 12.8, “Address Mapping,”
lists the devices and organizations supported
lists the devices and organizations supported
PNX1300
DSPCPU
Peripherals
On-Chip
4 × 512K × 32 SDRAM
2 × 512K × 16 SDRAM
2 × 512K × 16 SDRAM
4 × 1M × 16 SDRAM
4 × 1M × 32 SDRAM
4 × 2M × 16 SDRAM
4 × 4M × 16 SDRAM
4 × 1M × 16 SDRAM
4 × 2M × 16 SDRAM
4 × 4M × 16 SDRAM
2 × 1M × 8 SDRAM
2 × 2M × 4 SDRAM
4 × 2M × 8 SDRAM
for the two possible connection
Device(s)
Device(s)
PRELIMINARY SPECIFICATION
Highway
Data
PNX1300
Interface
Memory
Figure 12-10
RAS#, CAS#, WE#
Byte Enables[3:0]
Clock Enables,
Chip Selects#
Rank Size
Rank Size
Data[31:0]
Address,
32
32
64
16
32
16 MB
16 MB
16 MB
4 MB
8 MB
8 MB
2 MB
8 MB
in order to
b
2
4
1
2
Clock
MB
MB
MB
MB
MB
and
33 Ω
12.4.1
PNX1300 supports synchronous DRAM chips directly.
SDRAM has a fast, synchronous interface that permits
burst transfers at 1 word per clock cycle. The memory in-
side an SDRAM device is divided into two or four banks;
the SDRAM implements interleaved bank access to sus-
tain maximum bandwidth.
SDRAM devices implement a power down mechanism
with self-refresh. PNX1300 power management takes
advantage of this mechanism.
PNX1300 supports only Jedec-compatible SDRAM with
two or four internal banks of memory per device.
12.4.2
Also supported in PNX1300 systems, SGRAM is essen-
tially an SDRAM with additional features for raster graph-
ics functions. The device type is standardized by Jedec
and offered by multiple DRAM vendors. Tying the DSF
input of an SGRAM low makes the device operates like
a standard 32-bit-wide SDRAM and thus compatible with
the PNX1300 memory interface. PNX1300 is not sup-
porting the new types of SGRAMs that have a DDR inter-
face.
12.5
PNX1300 supports a variety of memory sizes thanks to:
• Many possible configurations of SDRAM devices
• Support for up to four memory ranks
The minimum memory size is 4 MB using two
2×512K×16 SDRAM devices on the 32-bit data bus, or 2
MB with one of these devices on a 16-bit data bus. Up to
two memory devices can be connected without any glue
logic and without sacrificing performance. The maximum
memory size with full performance is 64MB using two
4×4M×16 SDRAM chips on a 32-bit data bus, and 32 MB
using one 4×4M×16 SDRAM chip on a 16-bit data bus.
Several memory configurations can be constructed using
more devices. To do so, the frequency of the memory in-
1.
2.
However MM_CONFIG.SIZE is set to 8 MB (i.e. 5)
However MM_CONFIG.SIZE is set to 8 MB (i.e. 5).
MEMORY GRANULARITY AND SIZES
SDRAM
SGRAM
CS#
Address, Control
DQM[3:0]
CLK
DQ[31:0]
Philips Semiconductors
SDRAM
Memory
Array