p89v51rb2 NXP Semiconductors, p89v51rb2 Datasheet - Page 67

• Manufacturer Part Number: p89v51rb2
• Description: 8-bit 80c51 5 V Low Power 16/32/64 Kb Flash Microcontroller With 1 Kb Ram
• Manufacturer: NXP Semiconductors

NXP Semiconductors
P89V51RB2_RC2_RD2_4
Product data sheet
Fig 32. External data memory read cycle
Fig 33. External data memory write cycle
PSEN
port 0
port 2
ALE
RD
PSEN
port 0
port 2
ALE
WR
t
AVLL
from RI to DPL
A0 to A7
t
A0 to A7 from RI or DPL
LHLL
t
AVLL
t
LLAX
t
AVWL
t
LLWL
P2[7:0] or A8 to A15 from DPH
t
AVWL
t
AVDV
P2[0] to P2[7] or A8 to A15 from DPF
t
RLAZ
t
LLDV
t
LLAX
t
LLWL
Rev. 04 — 1 May 2007
t
t
RLRH
RLDV
t
QVWH
DATA OUT
t
WLWH
DATA IN
t
RHDX
P89V51RB2/RC2/RD2
t
RHDZ
t
WHLH
t
t
WHLH
WHQX
8-bit microcontrollers with 80C51 core
A0 to A7 from PCL
A0 to A7 from PCL
A0 to A15 from PCH
A8 to A15 from PCH
INSTR IN
002aaa550
© NXP B.V. 2007. All rights reserved.
INSTR IN
002aaa549
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