參數(shù)資料
型號: MT90500AL
廠商: Mitel Networks Corporation
英文描述: Multi-Channel ATM AAL1 SAR
中文描述: 多通道自動柜員機AAL1特區(qū)
文件頁數(shù): 128/159頁
文件大小: 514K
代理商: MT90500AL
MT90500
128
6.2.4
Interface with External Memory
Table 88 - MCLK - Master Clock Input Parameters
Characteristic
Sym
Min
Typ
Max
Units
Test Conditions
MCLK Frequency
t
MF
60
60.006
MHz
MCLK Period
t
MP
16.7
ns
MCLK Pulse Width (HIGH / LOW)
t
MH/L
7.5
8.33
ns
Table 89 - External Memory Interface Timing - Clock Parameters
Characteristic
Sym
Min
Typ
Max
Units
Test Conditions
MEMCLK Period
t
MEMP
16.7
ns
MEMCLK = MCLK = 60 MHz
MEMCLK Pulse Width (HIGH / LOW)
t
MEMH/
L
7.6
8.33
9.1
ns
MCLK = 16.7 ns period, 50/50 duty
cycle
6.7
8.33
10.0
ns
MCLK = 16.7 ns period, 45/55 duty
cycle
Table 90 - External Memory Interface Timing - Read Cycle Parameters
Characteristic
Sym
Min
Typ
Max
Units
Test Conditions
Data Input Setup
- (MEM_DAT[31:0] and
MEM_PAR[3:0] VALID) to MEMCLK rising
t
DIS
5
ns
Data Input Hold Time
- MEMCLK rising to
(MEM_DAT[31:0] and MEM_PAR[3:0]
INVALID)
t
DIH
1
ns
Output Delay
- MEMCLK rising to
(MEM_ADD[17:0] VALID and MEM_CS[1:0][H/
L] and MEM_WR[3:0] asserted)
t
OD
10
ns
C
L
= 50 pF
Output Hold Time
- MEMCLK rising to
(MEM_ADD[17:0] INVALID and
MEM_CS[1:0][H/L] and MEM_WR[3:0] de-
asserted)
t
OH
1.5
ns
C
L
= 50 pF
Note:
MEM_OE is continuously asserted low after reset.
Table 91 - External Memory Interface Timing - Write Cycle Parameters
Characteristic
Sym
Min
Typ
Max
Units
Test Conditions
Output Delay
- MEMCLK rising to
(MEM_ADD[17:0], MEM_DAT[31:0] and
MEM_PAR[3:0] VALID) and (MEM_CS[1:0][H/
L] and MEM_WR[3:0] asserted)
t
OD
11
ns
C
L
= 50 pF
Output Hold Time
- MEMCLK rising to
(MEM_ADD[17:0], MEM_DAT[31:0] and
MEM_PAR[3:0] INVALID) and
(MEM_CS[1:0][H/L] and MEM_WR[3:0] de-
asserted)
t
OH
1.5
ns
C
L
= 50 pF
High-Z to Drive Time
- MEMCLK rising to
(MEM_DAT[31:0] and MEM_PAR[3:0] change)
t
ZD
1
ns
C
L
= 50 pF
Minimum hold in High-Z
Drive to High-Z Time
- MEMCLK rising to
(MEM_DAT[31:0] and MEM_PAR[3:0] High-Z)
t
OZ
5
ns
Note:
MEM_OE is continuously asserted low after reset.
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