SPNS254A June 2022 – March 2024 TMS570LC4357-SEP
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
PARAMETER | MIN | MAX | UNIT | |
---|---|---|---|---|
tcyc(DMM) | Cycle time, DMMCLK clock period | 9.09 | ns | |
th(DMM) | High-pulse width | ((tcyc(DMM))/2) - ((tr+tf)/2) | ns | |
tl(DMM) | Low-pulse width | ((tcyc(DMM))/2) - ((tr+tf)/2) | ns |
PARAMETER | MIN | MAX | UNIT | |
---|---|---|---|---|
tssu(DMM) | Setup time, SYNC active before clk falling edge | 2 | ns | |
tsh(DMM) | Hold time, clk falling edge after SYNC deactive | 3 | ns | |
tdsu(DMM) | Setup time, DATA before clk falling edge | 2 | ns | |
tdh(DMM) | Hold time, clk falling edge after DATA hold time | 3 | ns |
Figure 7-37 shows a case with 1 DMM packet per 2 DMMCLK cycles (Mode = Direct Data Mode, data width = 8, portwidth = 4) where none of the packets received by the DMM are sent out, leading to filling up of the internal buffers. The DMMnENA signal is shown asserted, after the first two packets have been received and synchronized to the HCLK domain. Here, the DMM has the capacity to accept packets D4x, D5x, D6x, D7x. Packet D8 would result in an overflow. Once DMMnENA is asserted, the DMM expects to stop receiving packets after 4 HCLK cycles; once DMMnENA is deasserted, the DMM can handle packets immediately (after 0 HCLK cycles).