The NMI625 is an ISDB-T/PAL/NTSC/SECAM/FM receiver that implements the RF tuner and demodulator in the same device. NMI625 receives an input single-ended RF signal from the antenna through the VHF-Ⅰ/FM, VHF-Ⅲ, or UHF-band RF input.
The tuner integrates the LNAs. Mixers, VCO, PLL/loop filter, LO generation, crystal oscillator, baseband filters and amplifiers, and analog-digital converters. The tuner also includes an innovative closed loop RF gain control.
The demodulator receives a baseband input from the tuner and provides an automatic Gain control (AGC) signal to control the tuner gain. The demodulator implements the full acquisition, synchronization, and demodulation for ISDB-T, PAL, NTSC, SECAM, and FM transmission and the channel decoding as required by the ISDB specification STD-B31 and Brazil’s ABNT NBR 15601.
The NMI625 communicates with the host via SPI, I2C, BT.601/656 video interface, I2S interface for audio, and the transport stream serial interface for mthe decoded ISDB-T signal. An analog audio put is also provided as an alternative to the I2S audio interface.
Built –in CMOS RF Tuner
Worldwide PAL, NTSC and SECAM support
[1] Supports all NTSC standard : NTSC-M, NTSC-J, NTSC-4.43
[2] Supports all PAL standards : B, B1, D, D1, G, H, I, K, K1, M, N, Nc
[3] Supports SECAM B, D, G, K, K1
Worldwide FM support
[1] I2C audio interface for FM
[2] Analog audio interface for FM
Fully integrated VCOs, PLL loop filter, and crystal oscillator
Fully compliant 1-segment ISDB-T reception according to ARIB Standard STD-B31 and Brazil’s ABNT NBR 15601