STV5730 Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
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STV5730 Datasheet PDF : 19 Pages
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STV5730
7
0
DATA[7:0]
DATA
This 8-bit data message writes the data at the location indicated by the write pointer. The 4-bit data MSB
is copied from the last previous 16-bit data message.
The 0-bit data message writes a data at the location indicated by the write pointer. The last data is used
from the previous 8-bit or 16-bit data message.
15
00
12 11
10
don’t care
0
CONTROL
This 16-bit control message stops the 4*fsc quartz oscillator.
15
00
12 11
11
don’t care
0
CONTROL
This 16-bit control message resets the circuit and starts the 4*fsc quartz oscillator. This message should
not be used if an external 4 x fsc clock is used instead of the quartz. It is mandatory that reset operation is
as described in paragraph 2.3.
Figure 2
15
14
13
12
2
1
0
DATA
CLK
16-BIT
MESSAGE
CSN
DATA
7
6
5
4
3
2
1
0
CLK
8-BIT
MESSAGE
CSN
DATA
CLK
CSN
0-BIT
MESSAGE
2.2 - The Write Pointer
As described in the ”message format” paragraph,
an address consists of three fields : STRU[7:6],
BUF[11:8], DEPL[4:0].
The STRU[7:6] field indicates whether it is a PAGE
address or a ROW ATTRIBUTE / REGISTER ad-
dress. It also determines the address incrementa-
tion scheme.
- STRU[7:6] = 00 :
It is a PAGE address. BUF provides the row
number (from 0 to 10) and DEPL provides the
character number (from 0 to 27). DEPL is incre-
mented after each data message. When the write
of a row is completed, the write pointer is auto-
matically set to the next row first character.
- STRU[7:6] = 01 :
It is also a PAGE address but the incrementation
scheme is a bit different : when the write of a row
is completed, the write pointer is automaticallyset
to the first character of the same row.
- STRU[7:6] = 11 :
It is a row attribute or a register address. The BUF
field must be set to 0000 and the DEPL field is
incremented after each data access.
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