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PDF TTP255 Data sheet ( Hoja de datos )
| Número de pieza | TTP255 | |
| Descripción | 4-bit CPU base microcontroller | |
| Fabricantes | TONTEK | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TTP255 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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Preliminary
TTP255
TonTouchTM
TTP255 Target Spec.
§ General Description:
TTP255 MCU is an easy-used 4-bit CPU base microcontroller. It
contains 4K-word ROM 、 384-nibble RAM 、 timer/Counter 、 interrupt
service 、IO control hardware、touch pad feature、LDO and TT-BUS for
specified applications. The device is also suitable for diverse applications
in control appliance and consumer product.
§ Features:
1. Tontek Dual RISC 4-bit CPU cores
2. Total 26 crucial instructions and two addressing mode
3. Most instructions need 1 word and 1 machine cycle(2 system clocks)
except read table instruction(RTB)
4. advance CMOS process
5. Working memory with 4K*16 program ROM and 256*4 SRAM
6. 4-level stacks for CPUA (+4 stacks for CPUB)
7. Operating voltage: 2.0V~5.5V
8. System operating frequency: (at VDD=5V )
. High speed system oscillator (OSCH):
Resonator mode: 400KHz~8MHz
RC mode: 150KHz~4MHz
Built-in RC oscillator: 4MHz(typical at 5V)
External clock mode: DC~8MHz
.Low speed peripheral oscillator (OSCL):
Built-in RC oscillator: 16KHz(typical)
9. Offer 8~20 general programmable I/O or input pins
Built-in key wake-up feature enable by software setting
Providing external interrupt inputs and Timer clock inputs
Offering internal signal outputs, like buzzer(PFD)
10. Two 8-bit auto-reload timer/counter & one time base counter
4 timer clock sources(internal & external) selected by software
Timer provides the PFD feature for Buzzer output driver
Time base offers 2 various period interrupt request
11. MCU system protection and power saving controlled mode:
12’/08/21
Page 1 of 49
Ver3.0
1 page  
Preliminary
TTP255
TonTouchTM
$ DC & AC Characteristics
§ Absolute Maximum ratings:
ITEM
SYMBOL
Operating Temperature
Top
Storage Temperature
Tst
Supply Voltage
VDD
OTP Supply Voltage
VPP
Input Voltage
Vin
Human Body Mode
ESD
Note: VSS symbolizes for system ground
RATING
-20℃ ~ +70℃
-50℃ ~ +125℃
VSS-0.3 ~ VSS+6.0
VSS-0.3 ~ VSS+12.5
VSS -0.3 ~ VDD+0.3
>5
UNIT
℃
℃
V
V
V
KV
12’/08/21
Page 5 of 49
Ver3.0
5 Page 
Preliminary
TTP255
TonTouchTM
§ System function description:
S-1: System Oscillators
The high speed oscillator can be operated in 3 different oscillator
modes; resonator mode, RC mode & external clock mode. The oscillator
mode can be defined by mask option.
Resonator/crystal mode (400K Hz~8M Hz oscillator)
A 400K Hz~8M Hz crystal across OSCI and OSCO pads, capacitors are
connected between OSCI/OSCO pads and ground (VSS).
RC mode (150KHz~4MHz oscillator, built-in mode fixed 4MHz)
The external resistor connected OSCI and the other end ground to
VSS. The recommend value of Rext between 60KΩ and 500KΩ, if used Rext
value too low (under 2KΩ), the oscillator will become unstable or stop. On
the other hand, if used Rext value too high (over 1MΩ), the oscillator will
easily be interfered by external radiation. OSCH/4 output signal is the internal
oscillating RC clock divided by 4 and keeps at high level during system reset.
External clock mode (DC~8MHz)
The oscillator supports the external clock direct input (OSCI). For the
clock source directly drives the crystal oscillator input, so it needs the same
wake up time (OST) as crystal mode from power on or power saving mode.
S-2: Peripheral Oscillators
The low speed oscillator was built-in an internal RC oscillator that is for
low power consumption consideration and fixed peripheral device timing
control. The peripheral oscillator provides three models for user’s selection,
but the target peripheral oscillator frequency is set about 16 KHz. The
external R mode is just for micro-adjustment for more accurate 16 KHz
frequency.
Built-in RC oscillator and the frequency range between 12 KHz ~ 22 KHz.
S-3: CPU clock
The CPU clock comes from system/peripheral oscillator which was
controlled by H/L bit in PS register. In the normal operation, the system
clock comes from high speed system oscillator (OSCH/2). The low speed
operation frequency (OSCL/2) comes from RC oscillator was selected by
mask option.
12’/08/21
Page 11 of 49
Ver3.0
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TTP255.PDF ] | |
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