Cypress Semiconductor Perform CY8C24x94 User Manual download pdf (Page 7)

PSoC® 1 ISSP Programming Specifications, Document No. 001-15239 Rev. *J 7

2. Host Programmer - PSoC

1 Programming Interface

Figure 2-1 shows the connections between the host programmer and the target PSoC

1 device. If you use a Miniprog1 pro-

grammer, refer to the knowledge base article at http://www.cypress.com/?id=4&rID=50010 for information about the part num-

ber of the Miniprog1 programming header.

Figure 2-1. Host Programmer - PSoC 1 Interface

2.1 Programming Pin Drive Modes

The electrical pin connections between the programmer and the target shown in Figure 2-1 are listed in Table 2-1. This

includes two signal pins, a reset pin, a power pin, and a ground pin. Leave the other pins floating. The pin-naming conven-

tions and drive-strength requirements are also listed in Table 2-1.

Table 2-1. Pin Names and Drive Strengths

Pin Name Function Programmer HW Pin Requirements PSoC 1 Drive mode behavior

P1[0] SDATA - Serial Data In/Out Drive TTL Levels, Read TTL, High Z Strong drive (while sending data to host),

Resistive pull down mode (Reading data

from host, Waiting for data from host)

P1[1] SCLK - Serial Clock Drive TTL Levels High Z Digital input

XRES Reset Drive TTL Levels. Active High Active high Reset input with internal resistive

pull down

Power Supply Ground Connection Low Resistance Ground Connection Ground connection

Positive Power Supply Voltage 0 V, 1.8 V, 3.3 V, 5 V. 20 mA Current Capability Supply voltage

V

DD

SCLK(P1[1])

SDATA(P1[0])

XRES **

GND

SCLK

SDATA

XRES

Host Programmer PSoC 1

* For Programming in Power Cycle mode, the Host Programmer must be able to toggle power to the PSoC 1 device.

** XRES pin in PSoC 1 is an active-high input. It has an internal pull-down resistor to keep it at logic low when left

floating. XRES pin is not available in all device packages. Check the device datasheet for information on XRES pin

availability. Use Power Cycle mode if XRES is not available.

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Cypress Semiconductor Perform CY8C24x94 User Manual Page 7