KT148A Datasheet
Version：V1.1
KT148A Features
admaCPU Core
32-bit CPU,Built-in ICACH,can be
connected to Flash for expansion of code
The main frequency is up to120MHz
Memory
Built-in28Kbytes of SRAM
8Kbytes2-Way Icache
Clock Source
RC Clock frequency about16MHz
LRC(low power RC)clock frequency
about200KHz
Digital I/O
4programmable digital I/O pins
General the IO supports
pull-up(10k),pull-down(60k),
strong,weak output,input and high
impedance
4external interrupt/wake-up source(low
power available,can be multiplexed to
any I/O,with hardware filter)
Input channel and Output channel,
provide arbitrary IO input and output
options for some modules
Digital peripherals
Two UART Controllers(UART0/1)
supports DMA and Flow Control
Two SPI Controllers with DMA(SPI0/1)
support master mode and slave mode
Built-in Spi Flash to run code
Three32-bit Asynchronous Divider
Timers
One IIC Controller
Three channel PWM output
Infrared remote control decoder
adsl分离器
Watchdog
Analog Peripherals
0.5watt Class-D audio amplifier output
10-bit high precision ADC
Low voltage protection
Power on reset
Operating Conditions
Working voltage
VBAT:2.0v-5.5v
VDDIO:2.0v-3.4v
Operating Temperature:-40°C to+85°C
Package
SOP8
Application
Sound Toy
Audio player
1、Pin Definition
1.1Pin Assignment
Figure1-1KT148A_SOP8Package Diagram
1.2Pin Description
Table 1-1
KT148A_SOP8Pin Description
机械制图标题栏PIN NO.Name Type Drive (mA)Function
Description
1VSS G /Ground;
2
PB9
I/O
8
GPIO
(High Voltage Resistance)UART1TRXB:Uart1Data In/Out(B);CAP1:Timer1Capture;3PB1I/O 8/64
GPIO
(pull down)ADC11:ADC Input Channel 11;SPI1DOA:SPI1Data Out(A);I2C_SDA(A);
4PB0I/O 8/64
GPIO
(pull down)ADC10:ADC Input Channel 10;SPI1CLKA:SPI1Clock(A);I2C_SCL(A);
5
PB11I/O 8GPIO
(High Voltage Resistance)
OSCIB:Crystal Oscillator Input(B);DACN
O /Class-D APA Negative Output;6DACP O /Class-D APA Positive Output;7VDDIO P /Digital Power;
(Internal linear regulator output)8
VBAT
P
/
Battery Power Supply;
2、Electrical Characteristics
2.1Absolute Maximum Ratings
Table2-1
Symbol Parameter Min Max Unit Tamb Ambient Temperature-40+85°C Tstg Storage temperature-65+150°C VBAT Supply Voltage-0.3 5.5V V VDDIO33 3.3V IO Input Voltage-0.3 3.6V Note:The chip can be damaged by any stress in excess of the absolute maximum ratings listed below
2.2PMU Characteristics
Table2-2
Symbol Parameter Min Typ Max Unit Test Conditions
VBAT Voltage Input 2.0 3.7 5.5V_
V VDDIO Voltage output 2.0 3.0 3.4V VBAT=3.7V,100mA loading
伞齿轮设计I VDDIO Loading current__100mA VBAT=3.7V 2.3IO Input/Output Electrical Logical Characteristics
Table2-3
IO input characteristics
Symbol Parameter Min Typ Max Unit Test Conditions
V IL Low-Level Input
Voltage
-0.3_0.3*VDDIO V VDDIO=3.3V
V IH High-Level Input
Voltage
0.7*
_VDDIO+0.3V VDDIO=3.3V
IO output characteristics
V OL Low-Level Output
Voltage
__0.33V VDDIO=3.3V
V OH High-Level Output
Voltage
2.7__V VDDIO=
3.3V
2.4Internal Resistor Characteristics
Table2-4
Port General
Output
High
Drive
Internal
Pull-Up
Resistor
Internal
Pull-Down
Resistor
Comment
PB0,PB18mA64mA10K60K1、PB0&PB1default pull down
sky angel vol.92
2、internal pull-up/pull-down
resistance|accuracy±20% PB9,PB118mA_10K60K
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