參數(shù)資料
型號: PXAS30KBA512
英文描述: IC-SM-16-BIT MCU
中文描述: 集成電路釤16位MCU
文件頁數(shù): 41/51頁
文件大?。?/td> 405K
代理商: PXAS30KBA512
Philips Semiconductors
XA 16-bit microcontroller
32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),
I
2
C, 2 UARTs, 16 MB address range
Preliminary specification
XA-S3
2000 Mar 09
41
AC ELECTRICAL CHARACTERISTICS (3 V RANGE)
(continued)
This set of parameters is referenced to the XA-S3 clock output.
SYMBOL
FIGURE
PARAMETER
LIMITS
UNIT
MIN
MAX
Address Cycle
t
CHLH
t
CLLL
t
CHAV
t
CHAX
Code Read Cycle
26
CLKOUT rising edge to ALE rising edge
15
ns
26
CLKOUT falling edge to ALE falling edge
11
ns
26
CLKOUT rising edge to address valid
29
ns
26
CLKOUT rising edge to address changing (hold time)
2
ns
t
CHPL
t
CHPH
t
IVCH
t
CHIX
t
CHIZ
Data Read Cycle
26
CLKOUT rising edge to PSEN asserted
16
ns
26
CLKOUT rising edge to PSEN de-asserted
15
ns
26
Instruction valid to CLKOUT rising edge (setup time)
30
ns
26
CLKOUT rising edge to instruction changing (hold time)
0
ns
26
CLKOUT rising edge to Bus 3-State (code read)
t
C
–8
ns
t
CHRL
t
CHRH
t
DVCH
t
CHDX
t
CHDZ
Data Write Cycle
28
CLKOUT rising edge to RD asserted
20
ns
28
CLKOUT rising edge to RD de-asserted
16
ns
28
Data valid to CLKOUT rising edge (setup time)
28
ns
28
CLKOUT rising edge to Data changing (hold time)
0
ns
28
CLKOUT rising edge to Bus 3-State (data read)
t
C
–8
ns
t
CHWL
t
CHWH
t
QVCH
t
CHQX
Wait Input
30
CLKOUT falling edge to WR asserted
19
ns
30
CLKOUT rising edge to WR de-asserted
16
ns
30
Data valid to CLKOUT rising edge (setup time)
4
ns
30
CLKOUT rising edge to Data changing (hold time)
0
ns
t
CHWTH
NOTES:
1. Load capacitance for all outputs = 50 pF.
2. Variables V1 through V13 reflect programmable bus timing, which is programmed via the Bus Timing registers (BTRH and BTRL). Refer to
the XA User Guidefor details of the bus timing settings.
V1)
This variable represents the programmed width of the ALE pulse as determined by the ALEW bit in the BTRL register. V1 = 0.5 if the
ALEW bit = 0, and 1.5 if the ALEW bit = 1.
V2)
This variable represents the programmed width of the PSEN pulse as determined by the CR1 and CR0 bits or the CRA1, CRA0, and
ALEW bits in the BTRL register.
For a bus cycle with
no
ALE, V2 = 1 if CR1/0 = 00, 2 if CR1/0 = 01, 3 if CR1/0 = 10, and 4 if CR1/0 = 11. Note that during burst
mode code fetches, PSEN does not exhibit transitions at the boundaries of bus cycles. V2 still applies for the purpose of
determining peripheral timing requirements.
For a bus cycle
with
an ALE, V2 = the total bus cycle duration (2 if CRA1/0 = 00, 3 if CRA1/0 = 01, 4 if CRA1/0 = 10, and 5 if
CRA1/0 = 11) minus the number of clocks used by ALE (V1 + 0.5) = 2.
Example: if CRA1/0 = 10 and ALEW = 1, the V2 = 4 – (1.5 + 0.5) = 2.
V3)
This variable represents the programmed length of an entire code read cycle
with
ALE. This time is determined by the CRA1 and
CRA0 bits in the BTRL register. V3 = the total bus cycle duration (2 if CRA1/0 = 00, 3 if CRA1/0 = 01, 4 if CRA1/0 = 10, and
5 if CRA1/0 = 11).
V4)
This variable represents the programmed length of an entire code read cycle with
no
ALE. This time is determined by the CR1 and
CR0 bits in the BTRL register. V4 = 1 if CR1/0 = 00, 2 if CR1/0 = 01, 3 if CR1/0 = 10, and 4 if CR1/0 = 11.
V5)
This variable represents the programmed length of an entire data read cycle with
no
ALE. This time is determined by the DR1 and
DR0 bits in the BTRH register. V5 = 1 if DR1/0 = 00, 2 if DR1/0 = 01, 3 if DR1/0 = 10, and 4 if DR1/0 = 11.
V6)
This variable represents the programmed length of an entire data read cycle
with
ALE. The time is determined by the DRA1 and
DRA0 bits in the BTRH register. V6 = the total bus cycle duration (2 if DRA1/0 = 00, 3 if DRA1/0 = 01, 4 if DRA1/0 = 10, and
5 if DRA1/0 = 11).
31
WAIT valid prior to CLKOUT rising edge
8
30
4
ns
Next
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