HT46R47
8-Bit OTP Battery Charger Controller
Rev. 1.40
1
July 18, 2001
General Description
The device is an 8-bit high performance
RISC-like microcontroller designed for multi-
ple I/O product applications. The device is par-
ticularly suitable for use in products such as
battery charger controllers and A/D applica-
tions. A HALT feature is included to reduce
power consumption.
The program and option memories can be elec-
trically programmed, making the microcontrol-
ler suitable for use in product development.
Features
Operating voltage:
f
SYS
=4MHz: 3.3V~5.5V
f
SYS
=8MHz: 4.5V~5.5V
13 bidirectional I/O lines (max.)
1 interrupt input shared with an I/O line
8-bit programmable timer/event counter with
overflow interrupt and 7-stage prescaler
On-chip crystal and RC oscillator
Watchdog Timer
204814 program memory PROM
648 data memory RAM
Supports PFD for sound generation
HALT function and wake-up feature reduce
power consumption
Up to 0.5ms instruction cycle with 8MHz
system clock at V
DD
=5V
Six-level subroutine nesting
4 channels 9-bit resolution (8-bit accuracy)
A/D converter
1 channel (6+2)-bit PWM output shared
with an I/O line
Bit manipulation instruction
14-bit table read instruction
63 powerful instructions
All instructions in one or two machine
cycles
Low voltage reset function
18-pin DIP/SOP package
Pin Description
Pin No. Pin Name I/O ROM Code
Option
Description
4~2
1
18
17
16, 15
PA0~PA2
PA3/PFD
PA4/TMR
PA5/INT
PA6, PA7
I/O
Pull-high
Wake-up
PA3 or PFD
Bidirectional 8-bit input/output port. Each bit can be
configured as wake-up input by ROM code option.
Software instructions determine the CMOS output or
Schmitt trigger input with or without pull-high resistor
(determined by pull-high options: bit option). The PFD,
TMR and INT are pin-shared with PA3, PA4 and PA5,
respectively.
8
7
6
5
PB0/AN0
PB1/AN1
PB2/AN2
PB3/AN3
I/O
Pull-high
Bidirectional 4-bit input/output port. Software in-
structions determine the CMOS output, Schmitt trig-
ger input with or without pull-high resistor
(determined by pull-high options: bit option) or A/D in-
put.
Once a PB line is selected as an A/D input (by using
software control), the I/O function and pull-high
resistor are disabled automatically.
9
VSS
Negative power supply, ground.
10
PD0/PWM
I/O
Pull-high
PD0 or
PWM
Bidirectional I/O line. Software instructions deter-
mine the CMOS output, Schmitt trigger input with or
without a pull-high resistor (determined by pull-high
options: bit option). The PWM output function is
pin-shared with PD0 (dependent on PWM options).
11
RES
I
Schmitt trigger reset input. Active low.
12
VDD
Positive power supply
13
14
OSC1
OSC2
I
O
Crystal
or RC
OSC1, OSC2 are connected to an RC network or a
Crystal (determined by ROM code option) for the in-
ternal system clock. In the case of RC operation, OSC2
is the output terminal for 1/4 system clock.
Absolute Maximum Ratings
Supply Voltage ...............V
SS
-0.3V to V
SS
+5.5V
Storage Temperature ................-50C to 125C
Input Voltage.................V
SS
-0.3V to V
DD
+0.3V
Operating Temperature ..............-40C to 85C
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maxi-
mum Ratings may cause substantial damage to the device. Functional operation of this device
at other conditions beyond those listed in the specification is not implied and prolonged expo-
sure to extreme conditions may affect device reliability.
HT46R47
Rev. 1.40
3
July 18, 2001
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