TC1796
Peripheral Units (Vol. 2 of 2)
General Purpose Timer Array (GPTA)
User’s Manual 24-51 V2.0, 2007-07
GPTA, V2.0
How to Proceed
• Unsigned greater/equal compare:
SCO bit field = 0F
H
(15
d
)
Thereby, the sign bit of the result is selected to drive TGE flag.
This setting is valid for all possible periods. The observation window always matches the
period.
• Signed greater/equal compare:
Depending on the period, the appropriate k is selected, so that:
Period = M - m + 1 (= Max - Min + 1) (24.3)
2
k
< Period ≤ 2 × 2
k
(24.4)
SCO bit field = 0 to 0E
H
(0 to 14
d
)
Thereby, the result bit R
k
is selected to drive TGE flag.
This setting is possible for periods greater than 512.
Table 24-1 Period Range Depending on Selected k
2
k
< Period ≤ 2 × 2
k
k SCO Bit Field (decimal)
0 < period ≤ 512 Not covered by implementation
512 < period ≤ 1024 9 0
1024 < period ≤ 2048 10 1
2048 < period ≤ 4096 11 2
4096 < period ≤ 8192 12 3
8192 < period ≤ 16384 13 4
16384 < period ≤ 32768 14 5
32768 < period ≤ 65536 15 6
65536 < period ≤ 131072 16 7
131072 < period ≤ 262144 17 8
262144 < period ≤ 524288 18 9
524288 < period ≤ 1048576 19 10
1048576 < period ≤ 2097152 20 11
2097152 < period ≤ 4194304 21 12
4194304 < period ≤ 8388608 22 13
8388608 < period ≤ 16777216 23 14
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