PSB4860HV4.1 Lantiq, PSB4860HV4.1 Datasheet - Page 95

• Manufacturer Part Number: PSB4860HV4.1
• Manufacturer: Lantiq

Specifications of PSB4860HV4.1

• Lead Free Status / Rohs Status: Supplier Unconfirmed

2.2.4
These commands allow the direct access of any location (single word) of the external
memory. Additionally it is possible to erase any block in case of a Samsung or Toshiba
Flash device. These commands must not be used during normal operation as they may
interfere with the file system. No file must be open when one of these commands is
given.
The primary use of these commands is the in-system programming of a flash device with
voice prompts. Please refer to the appropriate Application Note for usage of the following
commands.
2.2.4.1
This command sets the 24 bit address pointer APTR. Only the address bits A
set, the address bits A
Table 71
Register # of Bits
FCMD
FDATA
Possible error conditions:
• file open
2.2.4.2
This command initializes the read procedure. This command must be given before the
read command can be issued. Table 72 shows the parameter for this command.
Table 72
Register # of Bits
FCMD
The overall procedure to read data is as follows. All accesses must be perfomed in
handshake mode, i.e., the RDY must go active before the next step can be taken:
1. Write address to register FDATA.
2. Write command Set Address to the command register FCMD.
3. Initialize read with handshake by writing command DMA Read to FCMD.
4. Start read of a word by transmitting 5A00
5. Read data via SCI similar to the Data Read Access as described in chapter 2.4.4.
Data Sheet
5
16
5
Low Level Memory Management Commands
Set Address
Set Address Parameters
DMA Read
DMA Read Parameters
0
Name
CMD
ADR
Name
CMD
-A
7
are automatically cleared.
Comment
Set Address command code
Address bits A
Comment
DMA Read command code (initialization)
95
H
via SCI.
8
-A
23
of address pointer APTR
PSB 4860
2000-01-14
8
-A
23
are