ATJ2073 ETC, ATJ2073 Datasheet - Page 23

• Manufacturer Part Number: ATJ2073
• Description: The Atj2073 is a Single-chip Highly-intergrated Digital Music System Solution for Devices such as Dedicated Audio Players, Pdas, and cell Phones
• Manufacturer: ETC

Assuming MCU instruction uses A[15:0] to access memory space.
mapped into MCU memory space. Additional three extended bits of SRAM Page Register (IO index=0x05) are
used to decode which page to access.
IPM/IDM can map to MCU memory space in 8K unit.
EMA26-28 are used to decode CE0- ~ CE6-.
5.4 USB1.1 Interface
5.5 MPEG Decoder
MPEG 2.5
SR\BR 8
8
11.025
12
MPEG 2
SR\BR 8
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With system software, ATJ2073 is competent for MPEG 1/2/2.5 Layer I/II/III decode.
Sample rates (SR) and bit rates (BR) supported is shown as the following table.
Compliant with USB SPEC 1.1. Certified by USB IF.
4 endpoints are provided. Support bulk, control, interrupt and isochronous transfer mode . Endpoint 1 and
endpoint 2 employ two independent FIFOs for bulk or isochronous transfers. Endpoint 0 and endpoint 3 have
8 bytes maximum packet size. There are 4 interrupt requests for each endpoint respectively. Generally, this
setting should be satisfying for most practical needs.
If A[15]=0 -> mapped to internal SRAM ,then
If A[15]=1 -> External address pin A25~A15 are IO mapped at 01h and 02h for EMA15-25. While
If A[14]=0, mapped to lower 16KB (ZRAM)
If A[14]=1, mapped to upper 16KB (IPMH/IPMM/IPML/IDMH/IDMM/IDML/VRAM) when they are
ATJ2073
16
16
24
24
CE0- is used to access boot code from ROM/MASK/NOR-type Flash
CE1- to CE6- can be configured to access ROM, or RAM or NAND-type Flash
Bit 2 1 0
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
32
32
40
40
Accessed Page
16K of IPM low byte
16K of IPM middle byte
16K of IPM high byte
reserved
16K of IDM low byte
16K of IDM middle byte
16K of IDM high byte
on-chip VRAM (Video RAM)
48
48
56
56
64
64
80
80
96
96
112
112
Actions Semiconductor Co.,LTD
128
128
144
144
160
160
Data Sheet