saa7893hl-02 NXP Semiconductors, saa7893hl-02 Datasheet - Page 34

• Manufacturer Part Number: saa7893hl-02
• Description: Saa7893hl Super Audio Media Player
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 10925
Product data
Fig 30. Base address writing.
H_DQ[11:8]
H_DQ[7:0]
H_DQ[15]
H_A[6:1]
H_A_sel
H_RWn
H_CSn
8.6.1 Writing base address
8.6.2 Writing to the SAA7893HL
In
SAD08 mode. First, the 12 bits base address is written indicated by H_A_sel line.
The SAA7893HL samples the base address on H_DQ(7:0) and H_DQ(11:8). After
that the normal write operation is performed as explained in
A write to address N of 16 bits to the SAA7893HL will be translated to two byte
accesses. First the LSB byte is written to address N [so A(0) = logic 0] and stored in
cache. Then the MSB byte is written to address N+1 [so A(0) = logic 1]. When the
SAA7893HL receives a write command at an odd address [A(0) = logic 1] always
16 bits are internally written whereby the Hword is composed of LSB byte in cache
and the MSB byte received at present write command. The SAA7893HL can be set to
big and little endian, whereby the described situation is the power-on state. Byte read
or write operations are not supported in SAD08 mode.
Figure 30
Fur_base = A(22:11)
write base address
A(22:15)
A(14:11)
the writing of the base address and a Hword to the host is given in
indication of an access to
the base address
Rev. 02 — 26 February 2003
LSB write/read
locations Fur_A[22:1] = Fur_base&A(10:1)
A(10:7)
D(7:0)
A(6:1)
write/read on SAA7893HL address
MSB write/read
D(15:8)
A(10:7)
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
A(6:1)
Super audio media player
SAA7893HL
Section
MCE051
8.6.2.
34 of 66