Z8F1680SH020SG Datasheet, PDF (92/412 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F1680 Series
Product Specification
67
Bits
Field
Reset
R/W
Address
7.11.14. LED Drive Level Registers
Two LED Drive Level registers consist of the LED Drive Level High Bit Register
(LEDLVLH[7:0]) and the LED Drive Level Low Bit Register (LEDLVLL[7:0]), as shown
in Tables 34 and 35. Two control bits, LEDLVLH[x] and LEDLVLL[x], are used to select
one of four programmable current drive levels for each associated Port C[x] pin. Each Port
C pin is individually programmable.
Table 34. LED Drive Level High Bit Register (LEDLVLH)
7
6
5
4
3
2
1
0
LEDLVLH
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
F83H
Table 35. LED Drive Level Low Bit Register (LEDLVLL)
Bits
7
6
5
4
3
2
1
0
Field
LEDLVLL
Reset
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address
F84H
Bit
[7:0]
LEDLVLH,
LEDLVLL
Description
LED Drive Level High Bit
LED Drive Level Low Bit
These bits are used to set the LED drive current. {LEDLVLH[x], LEDLVLL[x]}, in which
x=Port C[0] to Port C[7]. Select one of the following four programmable current drive levels
for each Port C pin.
00 = 3 mA
01 = 7 mA
10 = 13 mA
11 = 20 mA
PS025015-1212
PRELIMINARY
General-Purpose Input/Output