W921E400A |
RFQ for W921E400A Required Field |
 |
| Product | Manufacturers | Pack | D/C |
| W921E400A | - | - | 2002 |
The W921E400A/W921C400 is a single-chip CMOS 4-bit microcontroller that is a subset of W921E880A/W921C880. It features a 4-bit ALU, three multi-function timers, one channel DTMF generator, a beep tone generator, a serial I/O port and built in four by one channel comparator circuit, thus it can be easily implemented as telephone processor. Using the serial transmit/receive function, the W921E400A/W921C400 series can interface with Winbond LCD driver IC by the serial control circuit. There are also seven interrupt sources and 48-level subroutine nesting for interrupt applications.
The W921E400A/W921C400 have two power reduction modes, hold mode and stop mode, which help to minimize power dissipation. This product is a powerful microcontroller for telephone processor, remote controllers, multiple I/O products, keyboard controllers, speech synthesis LSI controllers, and other products with few components.
Features |
| Operating Voltage· 2.8 to 5.5V operating voltage for W921E400A EPROM TYPE· 2.4 to 5.5V operating voltage for W921C400 MASK ROM TYPEOperating Frequency· Crystal or RC for main system clock:- Crystal for 400K, 800K, 2M, 3.58M, 4 MHz- RC up to 4 MHzMemory· 4K × 10-bit ROM (super EPROM):· 512× 4-bit RAM:- 64 ×4-bit special register- 16 × 4-bit working register- 128×4-bit general register- 304× 4-bit multi-purpose registerStack· 8-bit stack pointerI/O Pins· 13 bidirectional and individually controllable I/O lines:- P2 Port: P2.0 to P2.1 large sink current pins and open drain option- P3 Port: P3.0 to P3.3 multi-function I/O- P4 Port: P4.2 to P4.3 open drain and pull high resistor option, multi-function I/O- P5 Port: P5.1 multi-function I/O- P6 Port: P6.0 to P6.3 open drain and pull high resistor option, multi-function I/O· 8 bidirectional I/O lines:- PA Port: PA.0 to PA.3 open drain and pull high resistor option- PB Port: PB.0 to PB.3 open drain and pull high resistor option |
| PARAMETER |
SYMBOL |
RATING |
UNIT |
| DC Supply Voltage |
VDD-VSS |
-0.3 to +7.0 |
V |
| Input/Output Voltage |
VIL |
VSS -0.3 |
V |
|
VIH |
VDD +0.3 |
V | |
|
VOL |
VSS -0.3 |
V | |
|
VOH |
VDD +0.3 |
V | |
| Power Dissipation |
PD |
120 |
mW |
| Operation Temperature |
TOPR |
-20 to +70 |
°C |
| Storage Temperature |
TSTG |
-55 to +150 |
°C |
