参数资料
型号: PCF8536BT/1,118
厂商: NXP Semiconductors
文件页数: 15/74页
文件大小: 0K
描述: IC LCD DRIVER LOW MPLEX 56TSSOP
特色产品: NXP - I2C Interface
标准包装: 1
显示器类型: LED,LCD
配置: 7段 + DP,14段 + DP + AP,点阵
接口: SPI 3 线串行
数字或字符: 20 字符,40 字符,320 元件
电源电压: 1.8 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 56-TFSOP(0.240",6.10mm 宽)
供应商设备封装: 56-TSSOP
包装: 标准包装
其它名称: 568-8446-6
NXP Semiconductors
PCF8536
Universal LCD low multiplex driver with 6 channel PWM generator
Remark: If an external clock is used, then this clock signal must always be supplied to the
device when the display is on. Removing the clock may freeze the LCD in a DC state
which will damage the LCD material.
8.1.5.2
Timing and frame frequency
The timing of the PCF8536 organizes the internal data flow of the device. This includes
the transfer of display data from the display RAM to the display segment outputs. The
timing also generates the LCD frame frequency which it derives as an integer division of
the clock frequency (see Table 15 ). The frame frequency is a fixed division of the internal
clock or of the frequency applied to pin OSCCLK when an external clock is used.
Table 15.
LCD frame frequencies
Frame frequency
Typical external Nominal frame
frequency (Hz)
frequency (Hz)
EFR bit
Value of q [1]
f fr ? LCD ? = ----------------- ?
f fr ? LCD ? = ----------------- ?
f clk ? ext
48
f clk ? ext
48 ? q
9600
230000
200
200
0
1
-
24
[1]
Other values of the frame frequency prescaler see Table 21 .
When the internal clock is used, or an external clock with EFR = 1, the LCD frame
frequency can be programmed by software in steps of approximately 10 Hz in the range of
60 Hz to 300 Hz (see Table 21 ). Furthermore the internal oscillator is factory calibrated,
8.1.6 Command: GPO-output-config
The behavior of the combined LCD and GPO outputs S5/GP5 to S0/GP0 is configured
with the bits described in Table 16 .
Table 16.
GPO-output-config - output mode config command for S5/GP5 to S0/GP0
Bit
Symbol
Value
Description
GPM0 and GPM1
7 to 4
3 to 2
1 to 0
-
GPM1[1:0]
GPM0[1:0]
1100
fixed value
output mode for S1/GP1
output mode for S0/GP0
GPM2 and GPM3
7 to 4
3 to 2
1 to 0
-
GPM3[1:0]
GPM2[1:0]
1101
fixed value
output mode for S3/GP3
output mode for S2/GP2
GPM4 and GPM5
7 to 4
3 to 2
1 to 0
-
GPM5[1:0]
GPM4[1:0]
1110
fixed value
output mode for S5/GP5
output mode for S4/GP4
Each output can be individually configured to be either an LCD segment output, a PWM
output or a static general-purpose output (GPO), see Table 17 .
Remark: Even if using GPO only, V LCD must still be applied to the device.
PCF8536
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 21 February 2012
? NXP B.V. 2012. All rights reserved.
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