pcf8832 NXP Semiconductors, pcf8832 Datasheet - Page 45

• Manufacturer Part Number: pcf8832
• Description: Pcf8832 Stn Rgb - 384 Output Column Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
11.2.2
The interface read mode means the microcontroller reads
data from the PCF8832. To do this the microcontroller first
sends a command sequence, then transmits the following
byte in the opposite direction (using SDO). After that, SCE
is required to go HIGH before a new command can be
sent.
2002 Aug 16
handbook, full pagewidth
STN RGB - 384 output column driver
R
EAD MODE
(
COMMAND REGISTER ONLY
1
2
3
4
5
6
7
8
9
start data transmission
command mode
control byte
command mode
register value = 02H
command mode
control byte
read register from ADR = n
stop data transmission
Fig.45 Read from register, basic protocol.
)
45
The PCF8832 samples the SDI data at rising SCLK edges,
but shifts SDO data at falling SCLK edges. Thus the host
microcontroller must read SDO data at rising SCLK edges.
The 8
terminated by the rising SCLK edge. The last rising SCLK
edge sets SDO to 3-state after the delay time t
D/C = 0
D/C = 0
RSTA = 1
D/C = 0
SCE = 0
SCE = 1
1
1
0
0
th
read bit is shorter than the others because it is
ADR [ 5:0 ] = 01H
ADR [ 5:0 ] = n
RSTA = 0
(1 SCLK cycle)
(8 SCLK cycles)
(1 SCLK cycle)
(8 SCLK cycles)
(1 SCLK cycle)
(8 SCLK cycles)
(8 SCLK cycles)
MGW718
Preliminary specification
PCF8832
ODE2
.