...........continued
PHY_TX_PWR (register 0x05)
TX Power Setting
915 MHz North American Band
PHY Modes: BPSK-40
(GC_TX_OFFS = 3), BPSK-40-
ALT (GC_TX_OFFS = 3),
OQPSK-SIN-{250, 500, 1000}
(GC_TX_OFFS = 2)
868.3 MHz European Band
PHY Modes: BPSK-20
(GC_TX_OFFS = 3),
OQPSK-SIN-RC-{100, 200,
400} (GC_TX_OFFS = 2)
OQPSK-RC-{100, 200, 400}
(GC_TX_OFFS = 3)
780 MHz Chinese Band
PHY Modes: OQPSK-RC-{250,
500, 1000} (GC_TX_OFFS = 2)
-10
0x0D
0x30
0x0A
-11
0x0E
0x31
0x0B
-12
0x0F
0x0F
0x0C
-13
0x10
0x10
0x0D
-14
0x11
0x11
0x0E
-15
0x12
0x12
0x0F
-16
0x13
0x13
0x10
-17
0x14
0x14
0x11
-18
0x15
0x15
0x13
-19
0x16
0x17
0x14
-20
0x17
0x18
0x15
-21
0x19
0x19
0x16
-22
0x1A
0x1A
0x17
-23
0x1B
0x1B
0x18
-24
0x1C
0x1C
0x19
-25
0x1D
0x1D
0x1A
7.4
Frame Buffer
The AT86RF212B contains a 128-byte dual port SRAM. One port is connected to the SPI interface, the other
one to the internal transmitter and receiver modules. For data communication, both ports are independent and
simultaneously accessible.
The Frame Buffer utilizes the SRAM address space 0x00 to 0x7F for RX and TX operation of the radio transceiver
and can keep a single IEEE 802.15.4 RX or a single TX frame of maximum length at a time.
Frame Buffer access conflicts are indicated by an underrun interrupt IRQ_6 (TRX_UR).
Note:
The IRQ_6 (TRX_UR) interrupt also occurs on the attempt to write frames longer than 127 octets to the
Frame Buffer (overflow). In that case, the content of the Frame Buffer cannot be determined.
Frame Buffer access is only possible if the digital voltage regulator (DVREG) is turned on. This is valid in all device
states except in SLEEP state. An access in P_ON state is possible if pin 17 (CLKM) provides the 1 MHz host clock.
7.4.1
Data Management
Data in Frame Buffer (received data or data to be transmitted) remains valid as long as:
• No new frame or other data are written into the buffer over SPI
• No new frame is received (in any BUSY_RX state)
• No state change into SLEEP state is made
ATSAMR30M18A
Module Description
©
2018-2021 Microchip Technology Inc.
and its subsidiaries
Datasheet
DS70005384B-page 23