Cypress S6J3200 Series, Manual

Page: 1015 / 1355

CHAPTER 27:HyperBus Interface
1014 S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G
3.5.
CS REG (Control Status Register)
The CS REG holds the configuration registers, which are used to control of the HYPERBUSI module.
Please refer to section 4 Registers for more detailed information about the CS REG.
And, CS REG controls and outputs the WPn, IENOn, and GPO signals and inputs the INTn signal for
controlling IENOn.
3.5.1.
WPn Signal
WPn signal is allocated to external interface in order to connect WP# of HyperBus memory. WPn signal is
controlled by HYPERBUSI_WPR. Please refer to section − Write Protection Register
(HYPERBUSIn_WPR).
3.5.2.
INTn / IENOn Signal
INTn signal is allocated to external interface in order to connect INT# of HyperBus memory. IENOn signal
is connected internal interrupt controller and is controlled by HYPERBUSI_IEN and INTn signal. Please
refer to section 4.2 Interrupt Enable Register (HYPERBUSIn_IEN) and − Interrupt Status Register
(HYPERBUSIn_ISR).
3.5.3.
GPO Signal
GPO signals are general purpose output signal and those signals are used for internal control or external
control depending on the implemented system. GPO signals are controlled by HYPERBUSI_GPOR.
Please refer to 4.7 General Purpose Output Register (HYPERBUSIn_GPOR).
The Figure 3-5 shows an example of internal control. In the example, GPO was used for choosing
HYPERBUSI module.
The Figure 3-6 shows an example of external control. In the example, GPO was used for resetting
HyperBus memory by software in addition to Hardware Reset from AXI interface.
Figure 3-5 Internal Control Example by GPO
ARM Core HYPERBUSI
HYPERBUSI
Graphics
Sub System
M
U
X
External
HyperBus
AXI
AXI
HyperBus
HyperBus
GPO
Figure 3-6 External Control Example by GPO
HyperFlash
Or
HyperRAM
HYPERBUSI
RESETn
(From AXI interface)
GPO
AXI RESET#
Glue logic