saa7893hl-02 NXP Semiconductors, saa7893hl-02 Datasheet - Page 21

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

Philips Semiconductors
9397 750 10925
Product data
Fig 15. Read from the SAA7893HL.
H_DQ[15:0]
H_A[6:1]
H_A_sel
H_RWn
H_CSn
8.3.1 Read mode
First the 16 bits of the base address are set indicated by the H_A_sel line. Then a
read access is started. In SAD16_03 mode there is no handshake line on which the
SAA7893HL can indicate that internal read operation is ready. Therefore, to be sure
that the requested data is read correctly, an extra read is needed indicated by the
H_A_sel line. In this read the data is presented as read by the previous read access.
The maximum time that the host must wait before this extra read is started is
approximately 30 sys_clk cycles. If in this time a new access is activated this access
can be lost.
Fur_base = A(22:7)
write base address
A(22:7)
indication of an access to
the base address
Rev. 02 — 26 February 2003
locations Fur_A[22:1] = Fur_base&A(6:1)
read ’indication’ on SAA7893HL address
undefined
A(6:1)
t wt
data is read indicated by H_A_sel
undefined
D(15:0)
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
Super audio media player
SAA7893HL
MCE040
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