HD64F3437TF16 Datasheet, PDF (113/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

5.1.3 Input/Output Pins
Table 5.1 summarizes the wait-state controller’s input pin.
Table 5.1 Wait-State Controller Pins
Name
Wait
Abbreviation
WAIT
I/O
Input
Function
Wait request signal for access to external addresses
5.1.4 Register Configuration
Table 5.2 summarizes the wait-state controller’s register.
Table 5.2 Register Configuration
Address
H'FFC2
Name
Wait-state control register
Abbreviation R/W
WSCR
R/W
Initial Value
H'08
5.2 Register Description
5.2.1 Wait-State Control Register (WSCR)
WSCR is an 8-bit readable/writable register that selects the wait mode for the wait-state controller
(WSC) and specifies the number of wait states. It also controls RAM area setting for dual-power-
supply flash memory, selection/non-selection of single-power-supply flash memory control
registers, and frequency division of the clock signals supplied to the supporting modules.
Bit
Initial value
Read/Write
7
RAMS^*1
0
R/W
6
RAM0^*1
0
R/W
5
4
CKDBL FLSHE^*2
0
0
R/W
R/W
3
WMS1
1
R/W
2
WMS0
0
R/W
1
WC1
0
R/W
0
WC0
0
R/W
Notes: *1 These bits are valid only in the H8/3437F and H8/3434F (dual-power-supply on-chip
flash memory versions).
*2 This bit is valid only in the H8/3437SF (S-mask model, single-power-supply on-chip
flash memory version).
WSCR is initialized to H'08 by a reset and in hardware standby mode. It is not initialized in
software standby mode.
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