AudioCodes Ltd.
AC4830xC-C VoPP
46
Catalog Number: LTRT-00060
3.3.4.2 Host Port Interface Timing Requirements
Table
3-15: Host Port Interface Timing Requirements
Parameter (units ns)
Min
Max
(91) Setup time, HRS, HR/W-, HI/LO- valid before HCDS- falling edge
10
(92) Hold time, HRS, HR/W-, HI/LO- valid after HCDS- falling edge
5
(93) Setup time, HAS low before HCDS- falling edge
12
(94) Pulse duration, HCDS- low
30*
(95) Pulse duration, HCDS- high
10
(96) Cycle time, HCDS- rising edge to next HCDS- rising edge
During Kernel Download Mode (CLKOUT = 10 MHz):
(see Figure
3-9, Figure
3-10)* *
500
During Other Modes (CLKOUT = 100 MHz):
case 1: when using HRDY (see Figure
3-11)
50
case 2: without using HRDY (see Figure
3-9, Figure
3-10)
50
(97) Setup time, HD valid before HCDS- rising edge
12
(98) Hold time, HD valid after HCDS- rising edge
3
* When the HRDY signal is not in use, during Run Mode of operation the Host must consistently meet
the 50 ns requirement.
* * When Run Mode not in active (during Download or Initialization Modes), the Host must consistently
meet the 500 ns requirement.
Notes: For Table 3-15
1. HRS stands for HRS0, HRS1 and HR/W-; HRWR- refers to either HRD- or HWR-; HCDS- refers to
the logical OR of HCS- and HRWR-.
2. On Host read accesses to the HPI, the setup time of HD before the HCDS- rising edge depends on
the Host waveforms and cannot be specified here.
3. HRDY is not valid when the RESET is asserted (during kernel download).
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