Internal Registers - Texas Instruments CC253x User Manual

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Timer 2 has several multiplexed registers. This is to be able to fit all the registers into the limited SFR
address space. The internal registers listed in
T2MOVF0, T2MOVF1, and T2MOVF2.
Register Name
t2tim[15:0]
t2_cap[15:0]
t2_per[15:0]
t2_cmp1[15:0]
t2_cmp2[15:0]
t2ovf[23:0]
t2ovf_cap[23:0]
t2ovf_per[23:0]
t2ovf_cmp1[23:0]
t2ovf_cmp2[23:0]
The registers listed in the remainder of this section are directly accessible in the SFR address space.
T2MSEL (0xC3) – Timer 2 Multiplex Select
Bit Name
No.
7 – 0
6:4 000
T2MOVFSEL
3 – 0
2:0 T2MSEL 000
T2M0 (0xA2) – Timer 2 Multiplexed Register 0
Bit Name
No.
7:0 T2M0 0x00
SWRU191F – April 2009 – Revised April 2014
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Table 22-1
Table 22-1. Internal Registers
Reset R/W
0x0000 R/W Holds the 16-bit upcounter
0x0000 R Holds the last captured value of the upcounter
0x0000 R/W Holds the period of the upcounter
0x0000 R/W Holds compare value 1 for the upcounter
0x0000 R/W Holds compare value 2 for the upcounter
0x00 0000 R/W Holds the 24-bit overflow counter
0x00 0000 R Holds the last captured value of the overflow counter
0x00 0000 R/W Holds the period of the overflow counter
0x00 0000 R/W Holds compare value 1 for the overflow counter
0x00 0000 R/W Holds compare value 2 for the overflow counter
Reset R/W
R0 Reserved. Read as 0
R/W The value of this register selects the internal registers that are modified or read
when accessing T2MOVF0, T2MOVF1, and T2MOVF2.
000: t2ovf (overflow counter)
001: t2ovf_cap (overflow capture)
010: t2ovf_per (overflow period)
011: t2ovf_cmp1 (overflow compare 1)
100: t2ovf_cmp2 (overflow compare 2)
101 to 111: Reserved
R0 Reserved. Read as 0
R/W The value of this register selects the internal registers that are modified or read
when accessing T2M0 and T2M1.
000: t2tim (timer count value)
001: t2_cap (timer capture)
010: t2_per (timer period)
011: t2_cmp1 (timer compare 1)
100: t2_cmp2 (timer compare 2)
101 to 111: Reserved
Reset R/W
R/W Indirectly returns/modifies bits [7:0] of an internal register depending on the
T2MSEL.T2MSEL value.
When reading the T2M0 register with T2MSEL.T2MSEL set to 000 and
T2CTRL.LATCH_MODE set to 0, the timer (t2tim) value is latched.
When reading the T2M0 register with T2MSEL.T2MSEL set to 000 and
T2CTRL.LATCH_MODE set to 1, the timer (t2tim) and overflow counter (t2ovf)
values are latched.
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can be accessed indirectly through T2M0, T2M1,
Function
Function
Function
Timer 2 Registers
203
Timer 2 (MAC Timer)