Maxim Integrated Secure Microcontroller - Manual (Page 110)

Secure Microcontroller User’s Guide
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TMOD Register Control Bit Summary
TMOD.7 (Timer 1);
TMOD.3 (Timer 0)
GATE
Gate Control When set to 1 with TRns=1, timer/counter’s input count pulses will only be
delivered while a 1 is present on the
INT pin. When cleared to 0, counter pulses
will always be received by the timer/counter as long as TRn=1.
Initialization: Cleared to 0 on any reset.
TMOD.6 (Timer 1);
TMOD.2 (Timer 0): C/ T
Counter/Timer Select When set to a 1, the counter function is selected for the associated programmable
timer; when cleared to 0, the timer function is selected.
Initialization: Cleared to 0 on any reset.
TMOD.5, TMOD.4
Timer 1 Mode Control
Mode Select These bit select the operating mode of the associated timer/counter as follows:
M1
M0
0 0 Mode 0: Eight bits with 5-bit prescale
0 1 Mode 1: 16 bits with no prescale
1 0 Mode 2: Eight bits with auto-reload
1 1 Mode 3: Timer 1 - Stopped
Initialization: Cleared to 0 on any reset.
TMOD.1, TMOD.0
Timer 0 Mode Control
Mode Select These bit select the operating mode of the associated timer/counter as follows:
M1
M0
0 0 Mode 0: Eight bits with 5-bit prescale
0 1 Mode 1: 16 bits with no prescale
1 0 Mode 2: Eight bits with auto–reload
1 1 Mode 3: Timer 0 - Two 8-bit timers
Initialization: Cleared to 0 on any reset.