PCF8579T NXP Semiconductors, PCF8579T Datasheet - Page 20

• Manufacturer Part Number: PCF8579T
• Manufacturer: NXP Semiconductors

Specifications of PCF8579T

• Operating Supply Voltage (typ): 3.3/5V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Package Type: VSO
• Pin Count: 56
• Mounting: Surface Mount
• Power Dissipation: 400mW
• Operating Supply Voltage (min): 2.5V
• Operating Supply Voltage (max): 6V
• Lead Free Status / Rohs Status: Not Compliant

NXP Semiconductors
PCF8579_5
Product data sheet
8.9 RAM access
There are three RAM-access modes:
These modes are specified by the bits G[1:0] of the RAM-access command. The
RAM-access command controls the order in which data is written to or read from the RAM
(see
To store RAM data, the user specifies the location into which the first byte will be loaded
(see
Subsequent data bytes will be written or read according to the chosen RAM-access mode.
Device subaddresses are automatically incremented between devices until the last device
is reached. If the last device has subaddress 15, further display data transfers will lead to
a wrap-around of the subaddress to 0.
Fig 15. RAM addressing scheme
•
•
•
•
•
•
Character
Half-graphic
Full-graphic
Device subaddress (specified by the device-select command)
RAM X-address (specified by the bits X[5:0] of the load-X-address command)
RAM bank (specified by the bits Y[1:0] of the RAM-access command)
Figure
Figure
MSB
LSB
17).
16):
1 byte
Rev. 05 — 11 May 2009
0
LCD column driver for dot matrix graphic displays
X address
X max
PCF8579
© NXP B.V. 2009. All rights reserved.
Y max
0
Y address
001aaj920
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