C8051F327-GM Silicon Laboratories Inc, C8051F327-GM Datasheet - Page 109

• Manufacturer Part Number: C8051F327-GM
• Description: IC 8051 MCU FLASH 16K 28QFN
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F32xr

Specifications of C8051F327-GM

• Program Memory Type: FLASH
• Program Memory Size: 16KB (16K x 8)
• Package / Case: 28-QFN
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: UART/USART, USB
• Peripherals: POR
• Number Of I /o: 15
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: C8051F3x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 1.5 KB
• Interface Type: UART/USB
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 2
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: C8051F326DK
• Minimum Operating Temperature: - 40 C
• Package: 28QFN EP
• Device Core: 8051
• Family Name: C8051F327
• Maximum Speed: 25 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1481 - DAUGHTER CARD TOOLSTCK C8051F327770-1006 - ISP 4PORT FOR SILABS C8051F MCU
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1297-5

C8051F326/7
Hardware will automatically reset INPRDY (EINCSRL.0) to ‘0’ when a packet slot is open in the endpoint
FIFO. Note that if double buffering is enabled for the endpoint, it is possible for firmware to load two pack-
ets into the IN FIFO at a time. In this case, hardware will reset INPRDY to ‘0’ immediately after firmware
loads the first packet into the FIFO and sets INPRDY to ‘1’. An interrupt will not be generated in this case;
an interrupt will only be generated when a data packet is transmitted.
If there is not a data packet ready in the endpoint FIFO when USB0 receives an IN token from the host,
USB0 will transmit a zero-length data packet and set the UNDRUN bit (EINCSRL.2) to ‘1’.
The ISO Update feature (see Section “12.7. Function Configuration and Control” on page 98) can be use-
ful in starting a double buffered ISO IN endpoint. If the host has already set up the ISO IN pipe (has begun
transmitting IN tokens) when firmware writes the first data packet to the endpoint FIFO, the next IN token
may arrive and the first data packet sent before firmware has written the second (double buffered) data
packet to the FIFO. The ISO Update feature ensures that any data packet written to the endpoint FIFO will
not be transmitted during the current frame; the packet will only be sent after a SOF signal has been
received.
Rev. 1.1
109