Maxim Integrated Secure Microcontroller - Manual (Page 38)

Secure Microcontroller User’s Guide
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Timer Mode Register
TMOD, 089H
D7 D6 D5 D4 D3 D2 D1 D0
GATE C/ T M1 M0 GATE C/ T M1 M0
RW-0 RW-0 RW-0 RW-0 RW-0 RW-0 RW-0 RW-0
R = Unrestricted Read Access, W = Unrestricted Write Access, T = Timed-access Write Only, n = Value after Reset, * = Special: see description
TMOD.7 (Timer 1);
TMOD.3 (Timer 0) GATE
Gate Control When set to 1 with TRn = 1, timer/counter’s input count pulses are only
delivered while a 1 is present on the INT pin. When cleared to 0, count pulses
are always received by the timer/counter a long as TRn = 1.
TMOD.6 (Timer 1);
TMOD.2 (Timer 0)
C/T
Counter/Timer Select When set to 1, the counter function is selected for the associated timer; when
cleared to 0, the timer function is selected.
TMOD.5-4 (Timer 1);
TMOD.1-0 (Timer 0)
M1, M0
Mode Select These bits select the operating mode of the associated timer/counter as
follows:
M1 M0 CONDITION
0 0 Mode 0: 8 bits with 5-bit prescale
0 1 Mode 1: 16 bits with no prescale
1 0 Mode 2: 8 bits with auto-reload
1 1
Mode 3: Timer 0 - Two 8-bit timers, Timer 1 -
Stopped