W90N740CDG Nuvoton Technology Corporation of America, W90N740CDG Datasheet - Page 152

• Manufacturer Part Number: W90N740CDG
• Description: IC MCU ARM7 TDMI 176-LQFP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W90r

Specifications of W90N740CDG

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 80MHz
• Connectivity: EBI/EMI, Ethernet, UART/USART, USB
• Peripherals: DMA, POR, WDT
• Number Of I /o: 21
• Program Memory Type: ROMless
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 1.62 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 176-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

W90N740CD/W90N740CDG
DDSR [1]: DSR# State Change
This bit is set whenever DSR# input has changed state, and it will be reset if the CPU reads the MSR.
DCTS [0]: CTS# State Change
This bit is set whenever CTS# input has changed state, and it will be reset if the CPU reads the MSR.
Whenever any of MSR [3:0] is set to logic 1, a Modem Status Interrupt is generated if IER[3]=1. Writing
MSR is a null operation (not suggested).
Time Out Register (TOR)
REGISTER
ADDRESS
R/W
DESCRIPTION
RESET VALUE
0xFFF8.001C
R/W
Time Out Register
TOR
0x0000.0000
7
6
5
4
3
2
1
0
TOIE
TOIC
TOIE [7]: Time Out Interrupt Enable
The feature of receiver time out interrupt is enabled only when TOR [7] = IER[0] = 1.
TOIC [6:0]: Time Out Interrupt Comparator
The time out counter resets and starts counting (the counting clock = baud rate) whenever the RX FIFO
receives a new data word. Once the content of time out counter (TOUT_CNT) is equal to that of time out
interrupt comparator (TOIC), a receiver time out interrupt (Irpt_TOUT) is generated if TOR [7] = IER [0] =
1. A new incoming data word or RX FIFO empty clears Irpt_TOUT.
Publication Release Date: Aug. 18, 2005
- 149 -
Revision A6