HE83003 Datasheet, PDF (5/23 Pages) King blillion Electronics Co.,Ltd. – 8-BIT MICRO-CONTROLLER

King Billion Electronics Co., Ltd
駿億電子股份有限公司
SXI
SXI
HE83003
HE80000 SERIES
SXO
SXO
Crystal Osc.
RC Osc.
Mask Option
MO_SXTAL
MO_SCKN
Description
0: RC Oscillator.
1: Crystal Oscillator.
0: Slow clock enable
1: Slow clock disable
With two clock sources available, the system can switch among operation modes of Normal, Slow, Idle,
and Sleep modes by the setting of OP1 and OP2 registers as shown in tables below to suit the needs of
application such as power saving, etc.
OP1
Field
Mode
Reset
Bit 7
DRDY
R/W
1
Bit 6
STOP
R/W
0
Bit 5
SLOW
R/W
0
Bit 4
INTE
R/W
0
Bit 3
T2E
R/W
0
Bit 2
T1E
R/W
0
Bit 1
Z
R/W
-
Bit 0
C
R/W
-
OP2
Field
Mode
Reset
Bit 7
IDLE
R/W
0
Bit 6
PNWK
R
-
Bit 5
TCWK
R
-
Bit 4
-
-
-
Bit 3
-
-
Bit 2
Bit 1
-
-
-
-
-
Bit 0
-
-
6. General Purpose I/O
The PRTC[7..0] and PRTD[7..0] are dedicated general purpose I/O port. All the I/O ports are
bi-directional and non-tristate output structure. The output has weak sourcing (50µA) and stronger
sinking (1mA) capability and each can be configured as push-pull or open-drain output structure
individually by mask option.
When the I/O port is used as input, the weakly high sourcing can be used as weakly pull-up. Open drain
can be used if the pull-up is not required and let the external driver to drive the pin. Please note that a
floating pad could cause more power consumption since the noise could interfere with the circuit and
cause the input to toggle. A ‘1’ needs to be written to port first before reading the input data from the I/O
pin. If the PMOS is used as pull-up, care should be taken to avoid the constant power drain by DC path
between pull-up and external circuit.
The input port has built-in Schmidt trigger to prevent it from chattering. The hysteresis level of Schmidt
trigger is 1/3*VDD.
September 8, 2004
5
V1.1
This specification is subject to change without notice. Please contact sales person for the latest version before use.