MC141531 View Datasheet(PDF) - Motorola => Freescale
Part Name
Description
Manufacturer
MC141531 Datasheet PDF : 25 Pages
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Bit Pattern
0011110X0
0011111X0
0100X3X2X1X0
01100A1A0X0
01101000
011011X1X0
0111000X0
0111011X0
0111101X0
0111111X0
1X6X5X4X3X2X1X0
Command
Set Multiplex Ratio
Set Icon Mode A/B
Set Vertical Scroll Value
Set Annunciator Control Signals
Reserved
Set Temperature Coefficient
Increase / Decrease Contrast Value
Reserved
Set External / Internal Oscillator
Set Oscillator Disable / Enable
Set GDDRAM Column Address
Comment
X0=0 : 1/16 Mux ratio (POR)
X0=1 : 1/17 Mux ratio
X0=0 : icon mode A (POR)
X0=1 : icon mode B
Use X3X2X1X0 as number of lines to scroll.
Scroll value = 0 upon POR
A1A0=00 : select annunciator 1 (POR)
A1A0=01 : select annunciator 2
A1A0=10 : select annunciator 3
X0=0 : turn selected annunciator off (POR)
X0=1 : turn selected annunciator on
X1X0= 00 : 0.00% (POR)
X1X0= 01 : -0.18%
X1X0= 10 : -0.22%
X1X0= 11 : -0.35%
X0=0 : Decrease by one
X0=1 : Increase by one
(Note: increment/decrement wraps round among the 16 contrast
levels. Start at the lowest level when POR.)
X0=0: normal operation (POR)
X0=1: test mode select
(Note: Make sure to set X0=0 during application)
X0=0: External oscillator (POR)
X0=1: Internal oscillator.
For internal oscillator place a resistor between OSC1 and OSC2.
For external oscillator mode, feed clock input to OSC2.
X0=0: oscillator master disable (POR)
X0=1: oscillator master enable.
This is the master control for oscillator circuitry. This command
should be issued after the “External / Internal Oscillator” com-
mand.
Set GDDRAM Column Address.
Use X6X5X4X3X2X1X0 as address bits.
Data Read / Write
To read data from the GDDRAM, input High to R/W pin and D/C pin. Data is valid at the falling edge of CS. And the GDDRAM column
address pointer will be increased by one automatically.
To write data to the GDDRAM, input Low to R/W pin and High to D/C pin. Data is latched at the falling edge of CS. And the GDDRAM column
address pointer will be increased by one automatically.
No auto address pointer increment will be performed for the Dummy Write Data after Master Clear GDDRAM. (Refer to the “Commands
Required for R/W Actions on RAM” Table)
MOTOROLA
MC141531
3–155
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