FreeCalypso > hg > freecalypso-schem2
view venus/src/periph/calypso_uart_in.v @ 30:74a89c0a6466
Venus MCL: add Q401 charging circuit MOSFET
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 21 Nov 2021 08:40:13 +0000 |
parents | 4baae6215619 |
children | d33cb696b335 |
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/* * This module encapsulates the mobile power domain buffers * in front of Calypso UART inputs. */ module calypso_uart_in (GND, VBAT, Vio, Host_TxD, Host_RTS, Host_DTR, Host_TxD2, RX_MODEM, CTS_MODEM, GPIO_DTR, RX_IRDA); input GND, VBAT, Vio; input Host_TxD, Host_RTS, Host_DTR, Host_TxD2; output RX_MODEM, CTS_MODEM, GPIO_DTR, RX_IRDA; /* U401 buffer common part */ logic_ic_common U401_common (.Vcc(Vio), .GND(GND)); /* buffer slots */ buffer_slot_3state Host_TxD_buffer (.A(Host_TxD), .nOE(GND), .Y(RX_MODEM)); buffer_slot_3state Host_RTS_buffer (.A(Host_RTS), .nOE(GND), .Y(CTS_MODEM)); buffer_slot_3state Host_DTR_buffer (.A(Host_DTR), .nOE(GND), .Y(GPIO_DTR)); buffer_slot_3state Host_TxD2_buffer (.A(Host_TxD2), .nOE(GND), .Y(RX_IRDA)); /* pull-ups to VBAT */ resistor Host_TxD_pullup (Host_TxD, VBAT); resistor Host_DTR_pullup (Host_DTR, VBAT); resistor Host_TxD2_pullup (Host_TxD2, VBAT); /* pull-down to GND */ resistor Host_RTS_pulldown (Host_RTS, GND); endmodule