em78p809n ELAN Microelectronics Corp, em78p809n Datasheet - Page 48

• Manufacturer Part Number: em78p809n
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

EM78P809N
8-Bit Microcontroller
44 •
4.11 Timer/Counter 4
Registers for Timer 4 Circuit
R_BANK Address NAME
BANK 0
BANK 0
BANK 0
SFR
Reading TCR3DA
cleared and interrupt is generated again. If an overflow before the edge is detected,
the FFH is loaded into TCR3DA and an overflow interrupt is generated. During
interrupt processing, it can be determined whether or not there is an overflow by
checking whether the TCR3DA value is FFH. After an interrupt (capture to TCR3DA or
overflow detection) is generated, capture and overflow detection are halted until
TCR3DA is read out.
TC3 Pin Input
Source Clock
TC3 Interrupt
Up-counter
0X0C
0X0B
0x0E
0x0E
TCR3DA
TCR3DB
TC4CR TC4FF1 TC4FF0
ISFR1
TC4D
IMR1
K-2
TC4D7
EXIF5
EXIE5
K-1 K 0
Bit 7
R/W
R/W
R/W
R/W
Fig. 24.Timing Chart of Capture Mode
K
Capture
1
TC4D6
TCIF2
TCIE2
Bit 6
R/W
R/W
R/W
R/W
m-1 m m+1
(This specification is subject to change without further notice)
TC4D5
TC4S
ADIF
Bit 5
ADIE
R/W
R/W
R/W
R/W
m
TC4CK2 TC4CK1 TC4CK0 TC4M1
TC4D4
Bit 4
R/W
R/W
Product Specification (V1.0) 07.26.2005
n-1 n 0
--
--
0
0
n
Capture
TC4D3
EXIF3
1
EXIE3
Bit 3
R/W
R/W
R/W
R/W
2
3
TC4D2
TCIF4
TCIE4
Bit 2
R/W
R/W
R/W
R/W
FE FF0
FE
TC4D1
SPIF
Bit 1
SPIE
R/W
R/W
R/W
R/W
Overflow
FF (Overflow)
1
2
TC4M0
TC4D0
TCIF3
TCIE3
Bit 0
R/W
R/W
R/W
R/W
3