PCA2117DUGSSLASHDA datasheet(24/107 Pages) NXP

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PCA2117

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Product data sheet

Rev. 4 — 8 April 2015

24 of 107

NXP Semiconductors

PCA2117

Automotive LCD driver for character displays

[1]

Default value.

Bit IM: When bit IM = 0, the chip is in character mode. In the character mode, both,

characters and icons are driven (multiplex drive mode 1:18 or 1:9). The VLCD generator, if

used, produces the LCD supply voltage (pin VLCDOUT) programmed with the

Set_VLCD_A command.

When bit IM = 1, the chip is in icon mode. In the icon mode only the icons are driven

(multiplex drive mode 1:2). The VLCD generator, if used, produces the LCD supply voltage

(pin VLCDOUT) programmed with the Set_VLCD_B command.

Bit IB: The icon blink control is independent of the cursor/character blink function.

When bit IB = 0, the icon blink is disabled. In this case, the even phase of icon data is

used which is stored in the ICON-RAM 00h to 27h.

When bit IB = 1, the icon blink is enabled. In this case, each icon is controlled by 2 bits.

The blinking consists of two half phases (corresponding to the cursor on and off phases,

called even and odd phases in the following). The Icon states for the even phase are

stored in the ICON-RAM 00h to 27h. These bits also define the icon state when icon

blinking is not used. The Icon states for the odd phase are stored in the ICON-RAM 28h to

4Fh.

8.1.3 Charge pump and LCD bias control commands

8.1.3.1

Command: Charge_pump_ctrl

The Charge_pump_ctrl command enables or disables the internal VLCD generation and

controls the charge pump voltage multiplier setting.

0IB

icon blink setting

0[1]

icon blink disabled

icon blink enabled

Table 29.

Icon_config - icon display configuration bit description …continued

See Table 38 for the ICON-RAM to ICON mapping.

Bit

Symbol

Value

Description

Table 30.

Charge_pump_ctrl - charge pump control command bit description

Bit

Symbol

Binary value

Description

-R/W

fixed value

RS[1:0]

fixed value

7 to 3

10000

fixed value

2CPE

charge pump setting

0[1]

charge pump disabled;

no internal VLCD generation;

external supply of VLCD

charge pump enabled

1 to 0

CPC[1:0]

charge pump voltage multiplier setting

00[1]

VLCD = 2  VDD2

VLCD = 3  VDD2

VLCD = 4  VDD2

VLCD = VDD2 (direct mode)

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