XA-H4 Datasheet, PDF (29/42 Pages) NXP Semiconductors – Single-chip 16-bit microcontroller

Philips Semiconductors
Single-chip 16-bit microcontroller
Preliminary specification
XA-H4
PRELIMINARY AC ELECTRICAL CHARACTERISTICS (5.0 V +/–10%)
V_DD = 5.0 V +/– 10%; T_amb = –40°C to +85°C (industrial)
Symbol
Figure
Parameter
All Cycles
F_C
t_C
t_CHCX
t_CLCX
t_CLCH
t_CHCL
t_AVSL
t_CHAH
t_CHAV
t_CHSH
t_CHSL
t_CODH
t_CPWH
t_CPWL
23
23
23
23
23
All
All
All
All
All
24
11, 12, 17, 18, 19, 20
11, 19
System Clock Frequency
System Clock Period = 1/FC
XTALIN High Time
XTALIN Low Time
XTALIN Rise Time
XTALIN Fall Time
Address Valid to Strobe low
Address hold after ClkOut rising edge ⁹
Delay from ClkOut rising edge to address valid
Delay from ClkOut rising edge to Strobe High⁹
Delay from ClkOut rising edge to Strobe Low⁹
ClkOut Duty Cycle High (into 40 pF max.)
CAS Pulse Width High
CAS Pulse Width Low
All DRAM Cycles
t_RP
22
RAS precharge time, thus minimum RAS high time⁸
Generic Data Read Only
t_AHDR
7, 14
Address hold (A19 – A1 only, not A0) after CS, BLE, BHE rise at
end of Generic Data Read Cycle (not code fetch)
Data Read and Instruction Fetch Cycles
t_DIS
t_DIH
t_OHDE
7, 8, 10, 11, 12, 14, 15,
17, 18, 19
7, 8, 10, 14, 15, 17, 18
8, 10, 11, 14, 18
Data In Valid setup to ClkOut rising edge
Data In Valid hold after ClkOut rising edge ²
OE high to XA Data Bus Driver Enable
Write Cycles
t_CHDV
t_DVSL
t_SHAH
t_SHDH
9, 13
16, 20
9, 16
9, 16
Clock High to Data Valid
Data Valid prior to Strobe Low
Minimum Address Hold Time after strobe goes inactive
Data hold after strobes (CS and BHE/BLE) high
Refresh
t_CLRL
21
CAS low to RAS low
Wait Input
t_WS
25
WAIT setup (stable high or low) to ClkOut rising edge
t_WH
25
WAIT hold (stable high or low) after ClkOut rising edge
NOTE:
1. See notes after the 3.3 V AC Timing Table
Limits
Min
Max
0
33.33
t_C* 0.5
t_C* 0.4
–
–
t_C – 21
1
–
1
1
t_CHCX–7
t_C – 12
t_C – 10
30
–
–
–
5
5
–
–
25
21
19
t_CHCX+3
–
–
(n * t_C) – 16⁸
–
t_C – 12
–
25
–
0
–
t_C – 14
–
–
25
t_C – 23
–
t_C – 25
–
t_C – 25
–
t_C – 15
–
20
–
0
–
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
1999 Sep 24
29