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TRC104

2.4 GHz RF Transceiver

RF Monolithics, Inc 

PM O DE

S le e p M o d e C o n fig u r a to n T im in g

S le e p M o d e

M ODE

CS

4.2 Stop Mode

Figure 9

R eset

120 m s

In Stop Mode the contents of the TRC104 configuration registers are maintained, and the digital voltage regulator

and parts of the digital circuitry are enabled. The remaining digital and analog circuitry is disabled to minimize

current consumption, which is typically 1.4 µA. No serial transaction can occur in Stop Mode. The typical turn-on

time from Stop Mode is 1.5 ms. Any operation to the TRC104 must wait until the turn on period is complete.

Figure 10 demonstrates the states of the mode control pins and the timing related to Stop Mode.

PM O DE

M ODE

S to p M o d e C o n fig u r a to n T im in g

S to p M o d e

CS

4.3 Standby Mode

Figure 10

1 .5 m s

Stand-by Mode is a low current mode that provides a very low transition time to configuration, transmit or receive

modes. In Standby Mode circuit blocks that are not being utilized are shutdown to minimize current usage. When

the TRC104 is set to Transmit, Receive or Configuration Mode, there is no start-up delay and the next action may

occur immediately. The power consumption of Standby Mode is dictated mainly by the crystal frequency used.

4.4 Configuration Mode

Configuration Mode allows access to the TRC104’s configuration registers. Serial data is applied to the SDAT pin

and serial clock is applied to the SCLK pin. See Section 5 for additional details.

4.5 Transmit/Receive Mode

This mode is enabled to load the transmit FIFO or receive data. The mode function, transmit or receive, is set

before enabling this mode. The mode function is selected by the C_Mode bit in configuration register 0x00. See

Section 5 for descriptions and timing of the various data transfer modes.

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Page 13 of 33

TRC104 - 08/13/09

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