MRF24WB0MA Datasheet, PDF (15/34 Pages) Microchip Technology – 2.4 GHz, IEEE Std. 802.11b™ RF Transceiver Module

MRF24WB0MA/MRF24WB0MB
2.3.4 STANDBY STATE
The Standby state is not user-controlled but is noted as
it helps identify and track certain operations of the
module during power tracing.
TABLE 2-1:
State
Off
Hibernate
Sleep
RX ON
TX ON
Standby
MRF24WB0MA/MRF24WB0MB POWER STATE DEFINITIONS
VDD
0V
3.3V
3.3V
3.3V
3.3V
3.3V
CS
0V
3.3V
0V
0V
0V
0V
Description
Power is completely disconnected
All internal power regulators are OFF – enabled by HIBERNATE pin
Enabled by TCPIP driver
Receive circuits are on and receiving
Transmit circuits are on and transmitting
State machine transition state only – not user controlled
FIGURE 2-3:
MRF24WB0MA/MRF24WB0MB POWER-STATE DIAGRAM
10 us
Off
RX On
TX On
Hibernate
Note 1
Note 1
Standby
200 us
200 us
Note 1: See Section 2.2.
2.4 JTAG Interface
Joint Test Action Group (JTAG) is the common name
used for the IEEE 1149.1 standard entitled Standard
Test Access Port and Boundary-Scan Architecture for
test access ports that are used for testing printed circuit
boards using boundary scan. The MRF24WB0MA/
MRF24WB0MB supports JTAG boundary scan. The
JTAG port provides the optional hardware JTAG Reset
input, JTAGRST. JTAG_EN and JTAGRST need to be
driven high to enable JTAG mode. JTAG should not be
enabled during normal functional operation. This func-
tion affects power state current.
Sleep
2.5 Debug Serial Interface
The MRF24WB0MA/MRF24WB0MB incorporates a
Transmitted Data pin (DEBUGTX) and a Received Data
pin (DEBUGRX) for serial debugging purposes. These
pins can be connected to commercially available RS-
232 line drivers/receivers with appropriate external
level shifters. The serial interface is fully tested at
115200 bits/seconds with RS-232/UART interface
applications.
 2010 Microchip Technology Inc.
DS70632A-page 15