PIC17C44 Datasheet, PDF (35/241 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM/ROM Microcontroller

PIC17C4X
TABLE 6-3: SPECIAL FUNCTION REGISTERS (Cont.’d)
Address Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
Power-on
Reset
Value on all
other
resets (3)
Bank 2
10h
11h
12h
13h
14h
15h
16h
17h
TMR1
TMR2
TMR3L
TMR3H
PR1
PR2
PR3L/CA1L
PR3H/CA1H
Timer1
Timer2
TMR3 register; low byte
TMR3 register; high byte
Timer1 period register
Timer2 period register
Timer3 period register, low byte/capture1 register; low byte
Timer3 period register, high byte/capture1 register; high byte
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
Bank 3
10h
11h
12h
13h
14h
15h
16h
PW1DCL
PW2DCL
PW1DCH
PW2DCH
CA2L
CA2H
TCON1
DC1
DC0
—
DC1
DC0 TM2PW2
DC9
DC8
DC7
DC9
DC8
DC7
Capture2 low byte
Capture2 high byte
CA2ED1 CA2ED0 CA1ED1
—
—
DC6
DC6
CA1ED0
—
—
DC5
DC5
T16
—
—
DC4
DC4
TMR3CS
—
—
DC3
DC3
TMR2CS
—
—
DC2
DC2
TMR1CS
xx-- ----
xx0- ----
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
0000 0000
uu-- ----
uu0- ----
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
0000 0000
17h _TCON2
CA2OVF CA1OVF PWM2ON PWM1ON CA1/PR3 TMR3ON TMR2ON TMR1ON 0000 0000 0000 0000
Unbanked
18h ⁽⁵⁾ PRODL
Low Byte of 16-bit Product (8 x 8 Hardware Multiply)
xxxx xxxx uuuu uuuu
19h ⁽⁵⁾ PRODH
High Byte of 16-bit Product (8 x 8 Hardware Multiply)
xxxx xxxx uuuu uuuu
Legend:
Note 1:
2:
3:
4:
5:
x = unknown, u = unchanged, - = unimplemented read as '0', q - value depends on condition. Shaded cells are unimplemented, read as '0'.
The upper byte of the program counter is not directly accessible. PCLATH is a holding register for PC<15:8> whose contents are updated
from or transferred to the upper byte of the program counter.
The TO and PD status bits in CPUSTA are not affected by a MCLR reset.
Other (non power-up) resets include: external reset through MCLR and the Watchdog Timer Reset.
The following values are for both TBLPTRL and TBLPTRH:
All PIC17C4X devices (Power-on Reset 0000 0000) and (All other resets 0000 0000)
except the PIC17C42 (Power-on Reset xxxx xxxx) and (All other resets uuuu uuuu)
The PRODL and PRODH registers are not implemented on the PIC17C42.
© 1996 Microchip Technology Inc.
DS30412C-page 35