DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 171

• Manufacturer Part Number: DF2211NP24V
• Description: H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
• Manufacturer: Renesas Technology / Hitachi Semiconductor

6.2
Table 6.1 summarizes the pins of the bus controller.
These pins are supported only by the H8S/2218 Group.
Table 6.1
Name
Address strove
Read
High write
Low write
Chip select 0 to 5 CS0 to CS5
Wait
Bus request
Bus request
acknowledge
Input/Output Pins
Pin Configuration
Symbol
AS
RD
HWR
LWR
WAIT
BREQ
BACK
I/O
Output
Output
Output
Output
Output
Input
Input
Output
Function
Strobe signal indicating that address output on
address bus is enabled.
Strobe signal indicating that external space is being
read.
Strobe signal indicating that external space is to be
written, and upper half (D15 to D8) of data bus is
enabled.
Strobe signal indicating that external space is to be
written, and lower half (D7 to D0) of data bus is
enabled.
Strobe signal indicating that areas 0 to 5 are selected.
Wait request signal when accessing external 3-state
access space.
Request signal that releases bus to external device.
Acknowledge signal indicating that bus has been
released.
Rev.7.00 Dec. 24, 2008 Page 117 of 698
REJ09B0074-0700