Zilog EZ80F91GA Instrukcja Użytkownika Pobierz pdf (Strona 118)

ZGATE Embedded Security Development Board UM024502-1012

108

ZGATE Embedded Security Development Kit

User Manual

An on-board USB port (U6) provides overcurrent protection in the event of a short or if a

device is connected to the Board that requires more than 500 mA @3.3 V. If either condi-

tion occurs, LED2 will illuminate.

If the Board is powered via a wall outlet and P3 is not used, communication with the PC

can be established through a DB9 female connector (P4) which is connected to the

UART1 block of the eZ80F91 MCU.

All signals that control access to on-board memory are routed to the Board’s test points;

please refer to Appendix B.

Schematic Diagrams on page 111.

Jumper Settings

All available GPIO ports that exist on the eZ80F91 MCU are routed to connector J10,

which is a standard 0.1"-pitch header. These signals are only routed to the odd-numbered

pins; all even-numbered pins are connected to GND. Please refer to Appendix B.

Sche-

matic Diagrams on page 111 for the exact signal connections to J10. The remaining jump-

ers are described in Table 4.

Table 4. ZGATE Embedded Security Development Board Jumper Settings

Jumper

Name Description State Function

Factory

Setting

J11 Flash WP In On-board Flash is disabled for writing.

Out On-board Flash is enabled for writing. Out

J12 Power Source 1–2 USB-powered. In

2–3 Wall-powered.

J26 RTC_V

In RTC is powered by on-board V

.In

Out External 3.3V source should be connected to J26.2

J25 RXD0 1–2 Pin L12 of U1 (PD1_RXD0) is connected to J10.61

2–3 Pin L12 of U1 (PD1_RXD0) is connected to U8.1

(TXD).

J24 RXD1 1–2 Pin G10 of U1 (PC1_RXD1) is connected to J10.45. In

2–3 Pin G10 of U1 (PC1_RXD1) is connected to U10.12

(R1OUT).

J23 CTS1 1–2 Pin F12 of U1 (PC3_CTS1) is connected to J10.41.

2–3 Pin F12 of U1 (PC3_CTS1) is connected to U10.9

(R2OUT).

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