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PDF SH66P22A Data sheet ( Hoja de datos )
| Número de pieza | SH66P22A | |
| Descripción | OTP 4-Bit Microcontroller | |
| Fabricantes | Sino Wealth | |
| Logotipo |  |
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SH66P22A
Features
SH6610C-based single-chip 4-bit micro-controller
OTPROM: 4K X 16 bits
RAM: 160 X 4 bits (data memory)
Operation voltage: 2.4V - 6.0V (typical 3.0V or 5.0V)
22 CMOS bi-directional I/O pins
4-level subroutine nesting (including interrupts)
One 8-bit auto re-load timer/counter
Warm-up timer for power on reset
Powerful interrupt sources:
- Internal interrupt (Timer0)
- External interrupts: PortB & PortC (falling edge)
OTP 4-bit Microcontroller
Oscillator (OTP option)
- X`tal oscillator:
32.768KHz - 4MHz
- Ceramic resonator: 400K - 4MHz
- RC oscillator :
400K - 4MHz
- External clock:
30K - 4MHz
Instruction cycle time:
- 4/32.768KHz(122us) for 32.768KHz OSC clock
- 4/4MHz (1us) for 4MHz OSC clock
Two low power operation modes: HALT and STOP
Built-in watch dog timer (OTP option)
Built-in power on reset
General Description
SH66P22A is a 4-bit micro controller. This chip integrates the SH6610C 4-bit CPU core with SRAM, 4K OTPROM, Timer and
I/O Ports.
Pin Configuration
PE2
PE3
PF1
PA2
PA3
T0
RESET
GND
PB0
PB1
PB2
PB3
www.datasheet4u.com
PD0
PD1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 PE1
27 PE0
26 PF0
25 PA1
24 PA0
23 OSCI
22 OSCO
21 VDD
20 PC3
19 PC2
18 PC1
17 PC0
16 PD3
15 PD2
1
V2.4
1 page  
SH66P22A
Low Power Detection (LPD)
The LPD function is used to monitor the supply voltage and applies an internal reset in the micro-controller at the time of battery
replacement. If the applied circuit satisfies the following conditions, the LPD can be incorporated using software control.
- High reliability is not required
- Power supply voltage VDD = 2.4 to 6.0 V
- Operating ambient temperature TA = -10℃ to + 60℃
Functions of the LPD Circuit
The LPD circuit has the following functions:
- It generates an internal reset signal when VDD ≤ VLPD
- It cancels the internal reset signal when VDD > VLPD
Here, VDD: power supply voltage, VLPD: LPD detect voltage, about 1.6 - 1.7V and lower than VDD-MIN (2.4V)
LPD Control Register
The LPD circuit is controlled by the software enable flag
Address Bit3
Bit2
Bit1
Bit0
R/W
$07
LPD3 LPD2
LPD1
LPD0
W
Remark
LPD Enable Control (LPD3 - 0):
1010: LPD Enable (Default);
0101: LPD Disable
LPD3﹑ LPD2﹑ LPD1﹑ LPD0:
1010
0101
LPD Enable/Disable flag
Enable LPD circuit (Power-on initial)
Disable LPD circuit
5
5 Page 
Initial State
Hardware
Program counter
CY
Data memory
System register
AC
Pseudo index register
DPL, DPM, DPH
Table Branch Register
Interrupt enable flag register
Interrupt request flag register
Timer mode register
Timer counter
Timer load register
WDT counter
WDT prescaler
I/O ports
LPD3 - 0
After Power on Reset
$000
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
0
0
0
0
0
0
0
Input
1010 (Enable LPD)
SH66P22A
11
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet SH66P22A.PDF ] | |
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