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PDF STC15F204EA Data sheet ( Hoja de datos )
| Número de pieza | STC15F204EA | |
| Descripción | MCU | |
| Fabricantes | STC | |
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www.STCMCU.com
Mobile:(86)13922805190
Tel:86-755-82948412
Fax:86-755-82944243
STC15F204EA series MCU
STSCT1C5LD2M0a4CtaEUAShsLeeeirmtieitseMd CU
STC MCU Limited
www.STCMCU.com
Update date: 2010/10/24
STC MCU Limited
website：www.STCMCU.com
Free Datasheet http://www.Datasheet4U.com
1 page  
www.STCMCU.com
Mobile:(86)13922805190
Chapter 1 Introduction
Tel:86-755-82948412
Fax:86-755-82944243
STC15F204EA series is a single-chip microcontroller based on a high performance 1T architecture 80C51
CPU, which is produced by STC MCU Limited. With the enhanced kernel, STC15F204EA series execute
instructions in 1~6 clock cycles (about 6~7 times the rate of a standard 8051 device), and has a fully compatible
instruction set with industrial-standard 80C51 series microcontroller. In-System-Programming (ISP) and In-
Application- Programming (IAP) support the users to upgrade the program and data in system. ISP allows the
user to download new code without removing the microcontroller from the actual end product; IAP means that the
device can write non-valatile data in Flash memory while the application program is running. the STC15F204EA
series has 9 interrupt sources, 10-bit ADC, on-chip high-precision RC oscillator and a one-time enabled Watch-
Dog Timer.
1.1 Features
• Enhanced 80C51 Central Processing Unit, faster 6~7 times than the rate of a standard 8051
• Operating voltage range: 3.8 ~ 5.5V or 2.4V ~ 3.6V (STC15L204EA series)
ited• Operating frequency range: 5MHz ~ 35MHz, is equivalent to standard 8051: 60MHz ~ 420MHz
Lim• A high-precision internal RC oscillator with temperature drifting ±1% (-400C~+850C)
• internal RC oscillator with adjustable frequency to 5.5296MHz/11.0592MHz/22.1184MHz/33.1776MHz
• On-chip 256 bytes RAM and 1K~6K bytes code flash with flexible ISP/IAP capability
CU• EEPROM function
M• Code protection for flash memory access
• Two 16-bit timers/counters — Timer 0 / Timer 1 with mode 0 (16-bit auto-reload mode), mode 1 (16-bit
STC timer mode) and mode 2 (8-bit auto-reload mode)
• simulate UART can be realized by P3.0,P3.1 and Timers
• 8-channel, 10-bit ADC associated interrupt, speed up to 300 thousands times every second
• 9 interrupt sources
• One 15 bits Watch-Dog-Timer with 8-bit pre-scalar (one-time-enabled)
• Three power management modes: idle mode, slow down mode and power-down mode
Power down mode can be woken-up by external INTx pin (INT0/P3.2, INT1/P3.3, INT2, INT3, INT4 )
• Excellent noise immunity, very low power consumption
• Support 2-wire serial flash programming interface.(GND/P3.0/P3.1/VCC)
• Programmable clock output Function. T0 output the clock on P3.5, T1 output clock on P3.4.
• 26 configurable I/O ports are available and default to quasi-bidirectional after reset. All ports may be
independently configured to one of four modes : quasi-bidirectional, push-pull output, input-only or open-
drain output. The drive capability of each port is up to 20 mA. But recommend the whole chip's should be
less than 90 mA.
• Package type: SOP-28,SKDIP-28
STC MCU Limited
website：www.STCMCU.com
Free Datasheet http://www.Datasheet4U.com
5 Page 
www.STCMCU.com
Mobile:(86)13922805190
Tel:86-755-82948412
Fax:86-755-82944243
1.5 STC15F204EA series Typical Application Circuit (for ISP)
System_Vcc / USB +5V
Vin
Power On
SW1
Vcc
10μF
USB+5V T1OUT R1IN GND
STCUSB1
1 P2.6
2 P2.7
3 P1.0/ADC0
4 P1.0/ADC1
5 P1.2/ADC2
P2.5 28
P2.4 27
P2.3 26
P2.2 25
P2.1 24
This part of the circuit has
nothing to do with the down-
load and is only to be observed
conveniently by oscilloscope
6 P1.3/ADC3
7 P1.4/ADC4
RSTOUT_LOW/P2.0 23
INT3/P3.7 22
Vcc
8 P1.5/ADC5
INT2/P3.6 21
9 P1.6/ADC6
CLKOUT0/T1/P3.5 20
ited0.1μF
10 P1.7/ADC7
CLKOUT1/T0/P3.4 19
11 P0.0/RST/SYSclkO
INT1/P3.3 18
12 Vcc
INT0/P3.2 17
13 P0.1
P3.1 16
14 Gnd
INT4/P3.0 15
1K
1K
LimVcc
CUSTC3232,STC232,MAX232,SP232
PC COM
M 1 C1+
Vcc 16
Vcc 2
0.1μF 2 V+
Gnd 15
3
Gnd
3 C1-
T1OUT 14 PC_RxD(COM Pin2) 5
4 C2+
R1IN 13 PC_TxD(COM Pin3)
5 C2-
R1OUT 12 MCU_RxD(P3.0)
6 V-
T1IN 11 MCU_TxD(P3.1)
7 T2OUT T2IN 10
8 R2IN R2OUT 9
U1-P1.0
U1-P1.1
MCU-VCC
U1-P3.0
U1-P3.1
Gnd
On-chip high-reliability Reset, No need external Reset circuit
P0.0/RST/SYSclkO pin defaut to I/O port when leave factory, and it can be configured RESET pin in
STC-ISP Writer/Programmer.
Internal high-precision RC oscillator with temperature drifting ±1%(-400C~+800C), No need expensive
external cystal oscillator.
STC MCU Limited
website：www.STCMCU.com
11
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