Datasheet
ALL CHANNELS (0 TO 7) “P” PART PULSE PATTERN REGISTER
Address: 18h
Register 18h controls the “P” part pulse pattern for all channels, 0 to 7.
b[63:0], b[63:16], b[63:24], b[63:32], b[63:40], b[63:48], b[63:56], or b[63:60]
Description PPPA
18h Default 5555 5555 5555 5555 h
Bit(s) Description
63:0,
63:16,
63:24,
63:32,
63:40,
63:48,
63:56,
63:60
PPPA: “P” Part Pulse Pattern for ALL Channels.These bits determine the “P” part pulse pattern for ALL
channels, 0 to 7. By writing a pulse pattern to register 18h, the same pulse pattern will be internally written to
Registers 08h to 0Fh simultaneously, and thus the P pulses of all channels will have the same pulse pattern.
By default, the pulse pattern length is 64 bits deep, and the bit stream or pulse pattern is 5555 5555 5555 5555
h.
ALL CHANNELS (0 TO 7) “N” PART PULSE PATTERN REGISTER
Address: 19h
Register 19h controls the “N” part pulse pattern for all channels, 0 to 7.
b[63:0], b[63:16], b[63:24], b[63:32], b[63:40], b[63:48], b[63:56], or b[63:60]
Description NPPA
19h Default AAAA AAAA AAAA AAAA h
Bit(s) Description
63:0,
63:16,
63:24,
63:32,
63:40,
63:48,
63:56,
63:60
NPPA: “N” Part Pulse Pattern for ALL Channels.These bits determine the “N” part pulse pattern for ALL
channels, 0 to 7. By writing a pulse pattern to register 19h, the same pulse pattern will be internally written to
Registers 10h to 17h simultaneously, and thus the N pulses of all channels will have the same pulse pattern.
By default, the pulse pattern length is 64 bits deep, and the bit stream or pulse pattern is AAAA AAAA AAAA
AAAA h.
TOP CONTROL REGISTER
Address: 1Ah
Register 1Ah is the basic initialization and global control register for the device.
b[13] b[12] b[11] b[10] b[9:3] b[2] b[1] b[0]
Description RSV CW IFE PLLE FD PL
1Ah Default 0 0 0 1 0 0 0 1 1 1 1 1 1 1
Bit(s) Description
13 RSV: Reserved. This is a reserved bit. When writing to Register 1Ah, keep this bit at “0.”
12
CW: Continuous Wave. This bit enables the CW Mode.
0 CW Mode Disabled. The beamformer is in normal firing mode. After the programmed pulse
pattern is sent out, each channel will automatically stop and await the next firing signal, i.e.,
TX_EN rising edge.
1 CW Mode Enabled. A default fixed pulse pattern will be stored in a circular shift register and
continuously sent out until the TX_EN signal is pulled low. The pulse pattern cannot be
customized in CW Mode; writing to Registers 08h to 19h will have no effect.
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LM96570