CY7C63001C-SXCT Cypress Semiconductor Corp, CY7C63001C-SXCT Datasheet - Page 5

• Manufacturer Part Number: CY7C63001C-SXCT
• Description: IC MCU 4K USB MCU LS 20SOIC
• Manufacturer: Cypress Semiconductor Corp
• Series: M8™r

Specifications of CY7C63001C-SXCT

• Applications: USB Microcontroller
• Core Processor: M8A
• Program Memory Type: OTP (4 kB)
• Controller Series: CY7C630xx
• Ram Size: 128 x 8
• Interface: USB
• Number Of I /o: 12
• Voltage - Supply: 4 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Document #: 38-08026 Rev. *B
6.1.3
The USB Controller includes 128 bytes of data RAM. The
upper 16 bytes of the data memory are used as USB FIFOs
for Endpoint 0 and Endpoint 1. Each endpoint 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 incre-
ments by 2 whenever a CALL instruction is executed and it
decrements by 2 whenever a RET instruction is used.
Data Memory Organization
after reset
firmware
DSP
DSP
user
PSP
Figure 6-2. Data Memory Space
The DSP pre-decrements by 1 whenever a PUSH instruction
is executed and it increments 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
Endpoint 1. Therefore, the DSP should be mapped to a
location such as 0x70 before initiating any data stack opera-
tions. Refer to the Reset section for more information about
DSP remapping after reset. Figure 6-2 illustrates the Data
Memory Space.
Address
0x00
0x02
0x04
0x70
0x77
0x78
0x7F
USB FIFO - Endpoint 0
USB FIFO - Endpoint 1
CY7C63001C
CY7C63101C
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