S912XEG128J2VAL
| Model | S912XEG128J2VAL |
| Description | IC,MICROCONTROLLER,16-BIT,CPU12 CPU,CMOS,QFP,112PIN,PLASTIC |
| PDF file | Total 1327 pages (File size: 7M) |
| Chip Manufacturer | ROCHESTER |
Chapter 14 Enhanced Capture Timer (ECT16B8CV3)
PBFLG indicates when interrupt conditions have occurred. The flag can be cleared via the normal flag
clearing mechanism (writing a one to the flag) or via the fast flag clearing mechanism (Reference TFFCA
bit in
Section 14.3.2.6, “Timer System Control Register 1 (TSCR1)”).
Field
1
PBOVF
Description
Pulse Accumulator B Overflow Flag
— This bit is set when the 16-bit pulse accumulator B overflows from
0xFFFF to 0x0000, or when 8-bit pulse accumulator 1 (PAC1) overflows from 0x00FF to 0x0000.
When PACMX = 1, PBOVF bit can also be set if 8-bit pulse accumulator 1 (PAC1) reaches 0x00FF and an active
edge follows on PT1.
14.3.2.30 8-Bit Pulse Accumulators Holding Registers (PA3H–PA0H)
Module Base + 0x0032
7
6
5
4
3
2
1
0
R
W
Reset
PA3H7
0
PA3H6
0
PA3H5
0
PA3H4
0
PA3H3
0
PA3H2
0
PA3H1
0
PA3H0
0
= Unimplemented or Reserved
Figure 14-52. 8-Bit Pulse Accumulators Holding Register 3 (PA3H)
Module Base + 0x0033
7
6
5
4
3
2
1
0
R
W
Reset
PA2H7
0
PA2H6
0
PA2H5
0
PA2H4
0
PA2H3
0
PA2H2
0
PA2H1
0
PA2H0
0
= Unimplemented or Reserved
Figure 14-53. 8-Bit Pulse Accumulators Holding Register 2 (PA2H)
Module Base + 0x0034
7
6
5
4
3
2
1
0
R
W
Reset
PA1H7
0
PA1H6
0
PA1H5
0
PA1H4
0
PA1H3
0
PA1H2
0
PA1H1
0
PA1H0
0
= Unimplemented or Reserved
Figure 14-54. 8-Bit Pulse Accumulators Holding Register 1 (PA1H)
MC9S12XE-Family Reference Manual , Rev. 1.19
558
Freescale Semiconductor
Because of an order from the United States International Trade Commission, BGA-packaged product lines and part numbers indicated here currently are not
available from Freescale for import or sale in the United States prior to September 2010: S12XE products in 208 MAPBGA packages
NOTE
When TFFCA = 1, the flag cannot be cleared via the normal flag clearing
mechanism (writing a one to the flag). Reference
Section 14.3.2.6, “Timer
System Control Register 1 (TSCR1)”.
