MC141539 View Datasheet(PDF) - Motorola => Freescale
Part Name
Description
Manufacturer
MC141539 Datasheet PDF : 29 Pages
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Bit Pattern
0110100X0
0110101X0
011011X1X0
0111000X0
0111001X0
0111010X0
0111011X0
0111100X0
0111101X0
0111110X0
0111111X0
1X6X5X4X3X2X1X0
Command
Set Duty Cycle
Reserved
Set Temperature Coefficient
Increase / Decrease Contrast Value
Reserved
Reserved
Reserved
Reserved
Set Internal / External Oscillator
Reserved
Set Oscillator Disable / Enable
Set GDDRAM Column Address
Comment
X0=0: 1/32 duty and tripler enabled (POR)
X0=1: 1/16 duty and doubler enabled
X0=0: Reserved
X0=1: Reserved
X1X0=00: 0.00% (POR)
X1X0=01: -0.18%
X1X0=10: -0.22%
X1X0=11: -0.35%
X0=0: Decrease by one level
X0=1: Increase by one level
(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: internal oscillator(POR)
X0=1: external oscillator
Internal oscillator circuit is automatically enabled if resistors are
placed at OSC1 and OSC2. For external oscillator, simply feed
clock in OSC2.
X0=0: disable oscillator (POR)
X0=1: enable oscillator.
This is the master control fro oscillator circuitry. This command
should be issued after the “Set 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
MC141539
3–139
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