Rainbow Electronics T89C51CC02 - Manual (Page 107)

Rev.A - May 17, 2001 107
Preliminary
T89C51CC02
16.5. High Speed Output Mode
In this mode the CEX output (on port 1) associated with the PCA module will toggle each time a match occurs
between the PCA counter and the module’s capture registers. To activate this mode the TOG, MAT, and ECOM
bits in the module’s CCAPMn SFR must be set.
Figure 108. PCA High speed Output Mode
CH CL
CCAPnH CCAPnL
ECOMn
CCAPMn, n = 0 to 1
0xDA to 0xDE
CAPNn MATn TOGn PWMn ECCFn CAPPn
16 bit comparator
Match
CF CR
CCON
0xD8
CCF1 CCF0
PCA IT
Enable
CEXn
PCA counter/timer
“1” “0”
Write to
CCAPnL
Reset
Write to
CCAPnH