CY7C63000 データシートの表示（PDF） - Cypress Semiconductor

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コンポーネント説明

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CY7C63000

Universal Serial Bus Microcontroller

Cypress Semiconductor 

PRELIMINARY

CY7C63000/CY7C63001

CY7C63100/CY7C63101

CY7C63200/CY7C63201

5.1.3 Data Memory Organization

The USB Controller includes 128 bytes of data RAM. The upper 16 bytes of the data memory are used as USB FIFOs for End

Point 0 and End Point 1. Each end point is associated with an 8-byte FIFO.

The USB controller includes two pointers into data RAM, the Program Stack Pointer (PSP) and the Data Stack Pointer (DSP).

The value of PSP after reset is 0x00. The PSP is incremented by 2 whenever a CALL instruction is executed and it is decremented

by 2 whenever a RET instruction is used.

The DSP is pre-decremented by 1 whenever a PUSH instruction is executed and it is incremented by 1 after a POP instruction

is used. The default value of the DSP after reset is 0x00, which would cause the first PUSH to write into USB FIFO space for End

Point 1. Therefore, the DSP should be mapped to a location such as 0x70 before initiating any data stack operations. Refer to

the Reset section for more information about DSP re-mapping after reset. Figure 5-2 illustrates the Data Memory Space.

DSP

after reset

PSP

Address

0x00

0x02

0x04

DSP

0x6E

0x70 USB FIFO - Endpoint 0

0x77

0x78

USB FIFO - Endpoint 1

0x7F

Figure 5-2. Data Memory Space

5.2 I/O Register Summary

I/O registers are accessed via the I/O Read (IORD) and I/O Write (IOWR, IOWX) instructions.

Table 5-1. I/O Register Summary

Register Name

Port 0 Data

I/O Address

0x00

Port 1 Data

0x01

Port 0 Interrupt Enable

Port 1 Interrupt Enable

Port 0 Pull-up

0x04

0x05

0x08

Port 1 Pull-up

USB EP 0 TX Config.

USB EP 1 TX Config.

0x09

0x10

0x11

USB Device Address

USB Status & Control

USB EP 0 RX Status

0x12

0x13

0x14

Read/Write

R/W

R/W

W

W

W

W

R/W

R/W

R/W

R/W

R/W

Function

General purpose I/O Port (low current)

General purpose I/O Port (high current)

Interrupt enable for pins in Port 0

Interrupt enable for pins in Port 1

Pull-up resistor control for Port 0 pins

Pull-up resistor control for Port 1 pins

USB End Point 0 transmit configuration

USB End Point 1 transmit configuration

USB device address

USB status and control

USB End Point 0 receive status

9

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