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10-31
TIMER/COUNTER UNIT
The read-back command can latch the count and status of multiple counters. This single com-
mand is functionally equivalent to several counter-latch commands, one for each counter latched.
Each counter's latched count and status is held until it is read or until you reconfigure the counter.
A counter’s latched count or status is automatically unlatched when read, but other counters’
latched values remain latched until they are read.
After latching a counter’s status and count with a read-back command, reading TMRn accesses
its status format (Figure 10-30). Reading TMRn again accesses its read format. When both the
count and status of a counter are latched, the first read of TMRn indicates the counter’s status and
the next one or two reads (depending on the counter’s read selection) indicate the counter’s count.
Subsequent reads return unlatched count values. When only the count of a counter is latched, then
the first one or two reads of TMRn return the counter’s count. When the counter is programmed
for the two-byte read selection, you must read two bytes.