v1.1
2008–2011 Teridian Semiconductor Corporation
117
Name
Location
Rst Wk
Dir
Description
LCD_MAP[55:48]
LCD_MAP[47:40]
LCD_MAP[39:32]
LCD_MAP[31:24]
LCD_MAP[23:16]
LCD_MAP[15:8]
LCD_MAP[7:0]
2405[7:0]
2406[7:0]
2407[7:0]
2408[7:0]
2409[7:0]
240A[7:0]
240B[7:0]
0
–
R/W
Enables LCD segment driver mode of combined SEGDIO pins. Pins that
cannot be configured as outputs (SEG48 through SEG50) become inputs with
internal pull ups when their LCD_MAP bit is zero. Also, note that SEG48
through SEG50 are multiplexed with the in-circuit emulator signals. When the
ICE_E pin is high, the ICE interface is enabled, and SEG48 through SEG50
become E_RXTX, E_TCLK and E_RST, respectively.
LCD_MODE[2:0]
2400[6:4]
0
–
R/W
Selects the LCD bias and multiplex mode.
LCD_MODE
Output
LCD_MODE
Output
000
4 states, 1/3 bias
100
Static display
001
3 states, 1/3 bias
101
5 states, 1/3 bias
010
2 states, bias
110
6 states, 1/3 bias
011
3 states, bias
LCD_ON
LCD_BLANK
240C[0]
240C[1]
0
–
R/W
Turns on or off all LCD segments without changing LCD data. If both bits are
set, the LCD display is turned on.
LCD_ONLY
28B2[6]
0
W
Puts the IC to sleep, but with LCD display still active. Ignored if system power
is present. It awakens when Wake Timer times out, when certain DIO pins
LCD_RST
240C[2]
0
–
R/W
Clear all bits of LCD data. These bits affect SEGDIO pins that are configured
as LCD drivers. This bit does not auto clear.
LCD_SEG0[5:0]
to
LCD_SEG15[5:0]
2410[5:0] to
241F[5:0]
0
–
R/W
SEG Data for SEG0 through SEG15. DIO data for these pins is in SFR
space.
LCD_SEGDIO16[5:0]
to
LCD_SEGDIO45[5:0]
2420[5:0] to
243D[5:0]
0
–
R/W
SEG and DIO data for SEGDIO16 through SEGDIO45. If configured as DIO,
bit 1 is direction (1 is output, 0 is input), bit 0 is data, and the other bits are
ignored.
LCD_SEG46[5:0]
to
LCD_SEG50[5:0]
243E[5:0] to 2442[5:0]
0
–
R/W
SEG data for SEG46 through SEG50. These pins cannot be configured as
DIO.
LCD_SEGDIO51[5:0]
to
LCD_SEGDIO55[5:0]
2443[5:0] to 2447[5:0]
0
–
R/W
SEG and DIO data for SEGDIO51 through SEGDIO55. If configured as DIO,
bit 1 is direction (1 is output, 0 is input), bit 0 is data, and the other bits are
ignored.
SEGDIO52 through SEDIO54 are available only on the 71M6542F.