Lucent Technologies MN10285K - Manual (Page 127)

Timers
16-Bit Timer Control Registers
Panasonic Semiconductor Development Company MN102H75K/F75K/85K/F85K LSI User Manual
126
Panasonic
TM4MD/TM5MD: Timer n Mode Register x’00FE80’/x’00FE90’
TMnEN: TMnBC count
0: Disable
1: Enable
TMnNLD: TMnBC, T flip-flop, and S-R flip-flop operation select
0: Set all to 0 (initialize)
1: Operate all
TMnUD[1:0]: Timer n up/down counter mode select
Ignored when two-phase encoding is selected.
00: Up counter
01: Down counter
10: Up when TMnIOA is high; down when low
11: Up when TMnIOB is high; down when low
TMnTGE: External trigger enable for start count
0: Disable
1: Start count at falling edge of TMnIOB
TMnONE: Counter operating mode select
0: Repeat (except with PWM output)
1: One-shot pulse (counter stops on the next clock after TMnBC = TMnCA)
TMnMD[1:0]: TMnCA and TMnCB operating mode select
00: Compare register (single buffer)
01: Compare register (double buffer)
10: Capture register (TMnIOA high: capture A; TMnIOA low: capture B)
11: Capture register (TMnIOA high: capture A; TMnIOB high: captureB)
TMnECLR: Timer n BC external clear
0: Don’t clear
1: Clear TMnBC asynchronously when the TMnIC signal goes high.
TMnLP: Timer n BC loop select
0: 0000–FFFF
1: 0000– value in TMnCA
TMnASEL: TMnIOA output select
0: S-R flip-flop output (single-phase PWM)
1: T flip-flop output (two-phase PWM)
TMnS[2:0]: Timer n clock source select
000: Timer 0 underflow
001: Timer 1 underflow
010: TMnIB signal
011: B
OSC
/4
100: 4x two-phase encoder
101: 1x two-phase encoder
110, 111: Reserved
Bit: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
TMn
EN
TMn
NLD
— —
TMn
UD1 TMn
UD0 TMn
TGE TMn
ONE TMn
MD1 TMn
MD0
TMn
ECLR
TMn
LP
TMn
ASEL
TMn
S2
TMn
S1
TMn
S0
Reset: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
R/W: R/W R/W R R R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W