Rainbow Electronics APC5890 - Manual (Page 6)

APLUS INTEGRATED CIRCUITS INC.
APC5890
www.aplusinc.com.tw TEL : 886-2-2782-9266 6
z 3FE0 System control 0. Write only. :
3FE0 0 1
BIT - 0
MUST
0 = PA14,PA15
ARE
IO
PINS
(
DEFAULT
).
BIT - 1 PB9 IS IO PIN ( DEFAULT ). PB9 IS EXTIRQ PIN .
BIT - 2 PB7
IS
IO
PIN
(
DEFAULT
). PB7
IS
EXTRAMCS.
BIT - 3
ADC
DISABLE
, PA13
IS
IO
PIN
(
DEFAULT
).
ADC
ENABLE
, PA13
IS
ADC
PIN
.
BIT - 4 NO USE ( MUST 0)
BIT - 5
NO USE
(
MUST
0)
BIT - 6 PWM DISABLE ( DEFAULT ). PWM ENABLE .
BIT - 7 DAC DISABLE ( DEFAULT ). DAC ENABLE .
z 3FE1 System Control 1. Write only.
3FE1 0 1
BIT - 0
T
IMER
A
CLOCK SELECT
32.768
K
H
Z
.(
DEFAULT
)
T
IMER
A
CLOCK SELECT SYSTEM
CLOCK
.
BIT - 1 NO USE ( MUST 0)
BIT - 2 T
IMER
A
DISABLE
.(
DEFAULT
) T
IMER
A
ENABLE
.
BIT - 3 T
IMER
B
DISABLE
.(
DEFAULT
) T
IMER
B
ENABLE
.
BIT - 4
T IMER A INTERRUPT
DISABLE .( DEFAULT )
T
IMER
A
INTERRUPT ENABLE
.
BIT - 5 T
IMER
B NMI
DISABLE
.(
DEFAULT
) T
IMER
B NMI
ENABLE
.
BIT - 6
S
YSTEM CLOCK
= PLL
CLOCK ( DEFAULT ).
S
YSTEM CLOCK
= 32768H
Z
.
BIT - 7 W
ATCHDOG TIMER DISABLE
.
W
ATCHDOG TIMER
ENABLE
.(
DEFAULT
)
z 3FE2 System control 2. Write only.
3FE2 0 1
BIT - 0
=1 Æ E
NTRY STAND
-
BY MODE
. I
N STAND
-
BY MODE
, H
OLD
CPU.
T
HE
NMI
AND
IRQ
WILL WAKE UP THE
CPU.
BIT - 1
=1 Æ E
NTRY SLEEP MODE
. I
N SLEEP MODE
,
THE BOTH OF MAIN
SYSTEM CLOCK AND
32768H
Z WILL BESTOPPED
,
SO ALL
FUNCTION ARE STOPPED AND ONLY EXTERNAL INTERRUPT
CAN WAKE UP THIS CHIP