S9S12GN16F0VLF Freescale Semiconductor, S9S12GN16F0VLF Datasheet - Page 689

Manufacturer Part Number

S9S12GN16F0VLF

16-bit Microcontrollers - MCU 16-bit16k Flash 2k RAM

Manufacturer

Freescale Semiconductor

Processor Series

Data Bus Width

Maximum Clock Frequency

Program Memory Size

Data Ram Size

Operating Supply Voltage

3.13 V to 5.5 V

Operating Temperature Range

- 40 C to + 85 C

Package / Case

Mounting Style

The SCI receiver can accommodate either 8-bit or 9-bit data characters. The state of the M bit in SCI

control register 1 (SCICR1) determines the length of data characters. When receiving 9-bit data, bit R8 in

SCI data register high (SCIDRH) is the ninth bit (bit 8).

During an SCI reception, the receive shift register shifts a frame in from the RXD pin. The SCI data register

is the read-only buffer between the internal data bus and the receive shift register.

After a complete frame shifts into the receive shift register, the data portion of the frame transfers to the

SCI data register. The receive data register full ﬂag, RDRF, in SCI status register 1 (SCISR1) becomes set,

Freescale Semiconductor

From TXD Pin

or Transmitter

Receiver Character Length

Character Reception

Baud Divider

Figure 20-20. SCI Receiver Block Diagram

MC9S12G Family Reference Manual, Rev.1.23

Detect Logic

Detect Logic

Internal Bus

11-Bit Receive Shift Register

Serial Communication Interface (S12SCIV5)

SCI Data Register

RX Active Edge IRQ