NS9210B-0-I75 Datasheet, PDF (66/68 Pages) List of Unclassifed Manufacturers – Figure 1 shows the NS7520 modules. Dashed lines indicate shared pins

Serial internal/external timing
synchronous serial internal clock
SCLK
Enable
TXD
RXD
76
76
77
77
79
78
synchronous serial external clock
SCLK
Enable
TXD
RXD
80
81
81
82
82
84
83
62
NS9360 Datasheet 03/2006