参数资料
型号: PCF8890
英文描述: 240 + 1 outputs TFT LCD gate driver
中文描述: 240 1输出TFT液晶栅极驱动器
文件页数: 45/76页
文件大小: 385K
代理商: PCF8890
2002 Aug 16
45
Philips Semiconductors
Preliminary specification
STN RGB - 384 output column driver
PCF8832
11.2.2
R
EAD MODE
(
COMMAND REGISTER ONLY
)
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.
ThePCF8832 samplestheSDIdataat risingSCLKedges,
but shifts SDO data at falling SCLK edges. Thus the host
microcontroller must read SDO data at rising SCLK edges.
The 8
th
read bit is shorter than the others because it is
terminated by the rising SCLK edge. The last rising SCLK
edge sets SDO to 3-state after the delay time t
ODE2
.
handbook, full pagewidth
MGW718
start data transmission
SCE = 0
SCE = 1
RSTA = 1
RSTA = 0
command mode
(1 SCLK cycle)
control byte
1
0
ADR[5:0] = 01H
1
0
ADR[5:0] = n
(8 SCLK cycles)
register value = 02H
(8 SCLK cycles)
control byte
(8 SCLK cycles)
stop data transmission
command mode
(1 SCLK cycle)
command mode
(1 SCLK cycle)
read register from ADR = n
(8 SCLK cycles)
9
8
7
6
5
4
3
2
1
D/C = 0
D/C = 0
D/C = 0
Fig.45 Read from register, basic protocol.
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