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PDF CS8954 Data sheet ( Hoja de datos )
| Número de pieza | CS8954 | |
| Descripción | General Purpose 8051 MCU 64K Flash Type with ISP | |
| Fabricantes | Myson Century | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CS8954 (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
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om CS8954
GeneralePetu4rUpo.cse 8051 MCU 64K Flash Type with ISPGENERAL DESCRIPTIONS
hThe CS8954 micro-controller is an 8051 CPU core
taSembedded device especially tailored for consumer
and/or general purpose applications. It includes an
a8051 CPU core, 768-byte SRAM, 4 channels of 6-bit
.DADC, 6 channels of PWM DAC, and a 64K-byte
winternal program Flash-ROM memory in 40-pin PDIP,
ww44-pin PLCC or PQFP package.
• 0.35um process
• 3.3V power supply
• 768-byte RAM
• 64K-byte program Flash memory
• Maximum 6 channels of PWM DAC
• Watchdog timer with programmable interval
• Single/double frequency clock output
• Hardware In system programming (ISP) without
boot code
• Two external interrupts
FEATURES
• 8051 core, 12MHz operating frequency with
msingle/double CPU clock option
• Maximum 4 channels of 6-bit ADC
• Flash-ROM code protection selection
• 40-pin PDIP, 44-pin PLCC or PQFP package
t4U.coBLOCK DIAGRAM
eeP1.0-7
hP3.0-2
P3.4
S8051
taCORE
RST
X1
aX2
CKO
P0.0-7
P2.0-3
RD
WR
ALE
INT1
.DP7.6-7
wP6.0-7
wwP5.0-6
AUX
I/O
P0.0-7
P2.0-7
RD
WR
ALE
INT1
XFR
ADC
AD0-3
PWM DAC
DA0-5
AUXRAM
.DataSheet4U.comMyson Century, Inc.
Taiwan:
USA:
wNo. 2, Industry East Rd. III,
4020 Moorpark Avenue Suite 115
wScience-Based Industrial Park, Hsin-Chu, Taiwan San Jose, CA, 95117
wTel: 886-3-5784866 Fax: 886-3-5784349
Tel: 408-243-8388 Fax: 408-243-3188
www.myson.com.tw
Rev. 0.4 April 2003
page 1 of 21
1 page  
CS8954
PIN CONFIGURATION
A “CMOS output pin” means it can sink and drive at least 4mA current. It is not recommended to use such pin
as input function.
A “open drain pin” means it can sink at least 4mA current. It can be used as input or output function and needs
an external pull up resistor.
A “8051 standard pin” is a pseudo open drain pin. It can sink at least 4mA current when output is at low level,
and drives at least 4mA current for 160nS when output transits from low to high, then keeps driving at 100uA to
maintain the pin at high level. It can be used as input or output function. It needs an external pull up resistor
when driving heavy load device.
There is an internal-pull down resistance on each CMOS PAD and an internal pull-down resistance on each
input PAD. It is recommended to add a pull high resistance on each open drain pin.
Output
Data
2 OSC
period
delay
Output
Data
4mA
Pin
4mA
CMOS Output Pin
4mA
10uA
120uA
4mA
Input
Data
Pin
8051 Standard Pin
No Current
Input
Data
Output
Data
Pin
4mA
Open Drain Pin
page 5 of 21
5 Page 
OPTION (w) : Chip option configuration (All are "0" in Chip Reset).
PWMF = 1 → Selects 94KHz PWM frequency.
= 0 → Selects 47KHz PWM frequency.
DIV253 = 1 → PWM pulse width is 253-step resolution.
= 0 → PWM pulse width is 256-step resolution.
FclkE = 1 → CPU is running at double rate
= 0 → CPU is running at normal rate
DCLK = 1 → CKO outputs double frequency system clock.
= 0 → CKO outputs single frequency system clock.
CS8954
I/O Ports
i) Port1
Port1 is a group of pseudo open drain pins or CMOS output pins. It can be used as general purpose I/O.
Behavior of Port1 is the same as standard 8051.
ii) P3.0-2, P3.4
If these pins are not set as IIC pins, Port3 can be used as general purpose I/O, interrupt, UART and Timer pins.
Behavior of Port3 is the same as standard 8051.
iii) Port5, Port6 and Port7
Port5, Port6 and Port7 are used as general purpose I/O. S/W needs to set the corresponding P5(n)oe and
P6(n)oe to define whether these pins are input or output.
Reg name
addr
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
PORT5
PORT5
F30h(r/w)
F31h(r/w)
P50
P51
PORT5
PORT5
PORT5
F32h(r/w)
F33h(r/w)
F34h(r/w)
P52
P53
P54
PORT5
PORT5
PORT5
F35h(r/w)
F36h(r/w)
F37h(r/w)
P55
P56
P57
PORT6
PORT6
PORT6
F38h(r/w)
F39h(r/w)
F3Ah(r/w)
P60
P61
P62
PORT6
PORT6
PORT6
F3Bh(r/w)
F3Ch(r/w)
F3Dh(r/w)
P63
P64
P65
PORT6
PORT6
PORT7
F3Eh(r/w)
F3Fh(r/w)
F76h(r/w)
P66
P67
P76
PORT7
F77h(r/w)
P77
page 11 of 21
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet CS8954.PDF ] | |
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